TASK DEFINITION: You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
PROBLEM: Question: Sally drops a bowling ball into a small wading pool, then she drops a much smaller baseball into the same wading pool. She notices that the bowling ball causes more water to splash out, this means that more water is displaced by the 
 Option1: larger bowling ball 
 Option2: smaller baseball. 
 Explanation: So more water is displaced by a bigger body than a smaller one.

SOLUTION: larger bowling ball

PROBLEM: Question: Endotherms have the ability to regulate their own temperature. By decreasing it's rate of metabolism, the body heat becomes 
 Option1: Decreased 
 Option2: Increased 
 Explanation: For example, on a cold day, an endotherm may produce more body heat by increasing its rate of metabolism.

SOLUTION: Decreased

PROBLEM: Question: When you work out at the gym a lot your muscles become 
 Option1: smaller 
 Option2: larger 
 Explanation: Muscles that are exercised are bigger and stronger than muscles that are not exercised.

SOLUTION:
larger