In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Example Input: Question: Geremy went to the gym frequently, while Tim did not. Who likely has larger muscles? 
 Answer: Geremy
Example Output: Exercising muscles increases their size, and bigger muscles have greater strength.

Example Input: Question: Marie is rolling cards down a hill. She wants to know which cart will get to the bottom of the hill slower, an empty cart, or a full cart? The cart that will finish first will have a mass that is 
 Answer: lower
Example Output: An object has greater momentum if it has greater mass, greater velocity, or both.

Example Input: Question: Evan is picking up rocks on the beach. Some rocks are very basic small ones, and others are large, clumpy stones with different textures. The rocks that are less difficult to identify had amounts of metamorphism that were 
 Answer: less extreme
Example Output:
The more extreme the amount of metamorphism, the more difficult it is to tell what the original rock was.