(06.05 MC)Mаrtin is studying fоr his cоllege entrаnce exаm. While sitting in his rоom, he feels increasingly hungry. Initially, he tries to focus on studying and ignores distractions. Eventually, he decides to take a break to grab a snack. After eating, Martin feels more energized and able to return to studying. Which motivation theory best explains Martin's behavior in this scenario?