*357Defendant, Kimberly Murphy, was convicted following a jury trial of second-degree child abuse, MCL 750.136b(3). Murphy was sentenced to 36 to 120 months' imprisonment, with 76 days of credit for jail time served. Because the jury verdict is not supported by sufficient evidence, we vacate Murphy's conviction and sentence.
I. BASIC FACTS
This case arises from the death of Murphy's 11-month-old daughter, Trinity Murphy.1 The prosecutor *358presented evidence showing that Trinity died after ingesting a toxic quantity of morphine.2 The prosecutor's theory was that Trinity died because of her parents' "reckless acts," which she contended consisted of "their inaction" and their inability to protect their child and provide a safe home environment. In support of her theory, the prosecutor presented substantial evidence showing that the home was in a deplorable and filthy condition, that there were prescription morphine pills in the home, and that Trinity's parents had failed to clean the home to ensure that the morphine pills were removed *376after Trinity's grandmother (who was prescribed the medication and had been living in the home) passed away. The defense theory was that no reckless act taken by Murphy caused Trinity's death.
II. SUFFICIENCY OF THE EVIDENCE
A. STANDARD OF REVIEW
Murphy argues that there was insufficient evidence to convict her of second-degree child abuse. We review de novo challenges to the sufficiency of the evidence. People v. Ericksen , 288 Mich.App. 192, 195, 793 N.W.2d 120 (2010). When reviewing a challenge to the sufficiency of the evidence, "[a]ll conflicts in the evidence *359must be resolved in favor of the prosecution, and circumstantial evidence and all reasonable inferences drawn therefrom can constitute satisfactory proof of the crime." People v. Solloway , 316 Mich.App. 174, 180-181, 891 N.W.2d 255 (2016) (citations omitted). " 'It is for the trier of fact, not the appellate court, to determine what inferences may be fairly drawn from the evidence and to determine the weight to be accorded those inferences.' " People v. Henry , 315 Mich.App. 130, 135, 889 N.W.2d 1 (2016), quoting People v. Hardiman , 466 Mich. 417, 428, 646 N.W.2d 158 (2002).
B. ANALYSIS
Under MCL 750.136b(3), a person is guilty of second-degree child abuse under any one of three circumstances:
(a) The person's omission causes serious physical harm or serious mental harm to a child or if the person's reckless act causes serious physical harm or serious mental harm to a child.
(b) The person knowingly or intentionally commits an act likely to cause serious physical or mental harm to a child regardless of whether harm results.
(c) The person knowingly or intentionally commits an act that is cruel to a child regardless of whether harm results.
Only Subdivision (a) is applicable in this case. Under Subdivision (a), a person can be convicted of second-degree child abuse if his or her "omission causes serious physical harm or serious mental harm to a child" or if his or her "reckless act causes serious physical harm or serious mental harm to a child." MCL 750.136b(3)(a).3
*360The prosecutor proceeded under the theory that Murphy had committed a reckless act causing serious physical harm to Trinity, not that her omission caused serious physical harm to Trinity, and that was the only theory on which the jury was instructed.4 To establish second-degree child abuse based on a reckless act, the prosecution must prove (1) that the defendant was a parent or a guardian of the child or had care or custody of or authority over the child, (2) that the defendant committed a *377reckless act, (3) that, as a result, the child suffered serious physical harm, and (4) that the child was under 18 years old at the time. See M. Crim. J.I. 17.20. Generally, determining whether an act was reckless is a jury question. See People v. Edwards , 206 Mich.App. 694, 696-697, 522 N.W.2d 727 (1994).
The question in this case, however, is not whether Murphy was "reckless."5 Instead, it is whether she committed a "reckless act ." The statute does not define what constitutes an "act" for purposes of MCL 750.136b(3)(a). Black's Law Dictionary (10th ed.)
*361defines "act" as "1. Something done or performed, esp. voluntarily; a deed," or "2. The process of doing or performing; an occurrence that results from a person's will being exerted on the external world[.]" Thus, in order to constitute a "reckless act" under the statute, the defendant must do something and do it recklessly. Simply failing to take an action does not constitute an act. In this case, the prosecutor presented no evidence that any affirmative act taken by Murphy led to Trinity's death. Instead, she only directed the jury to Murphy's reckless inaction , i.e., her failure to clean her house to ensure that morphine pills were not in Trinity's reach.
Because there is no evidence in the record of a reckless act taken by Murphy that caused Trinity to suffer serious physical harm, we vacate her conviction and sentence for second-degree child abuse.6
Shapiro, J., concurred with M.J. Kelly, J.