I'll give you a question, please answer with step-by-step reasoning process. Why does a bodybuilder eat so much?
Options:
- pleasant conversation
- store food for winter
- satisfy hunger
- sounds of digestion
- gain weight

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Body builder needs to gain muscle in bulking phase. Gainig muscle requires to eat more calories and result in gaining weight.
The answer: gain weight.