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.

Input: Consider Input: Question: If an animal is able to eat food more difficult is it more or less likely to reproduce? 
 Answer: less

Output: Natural selection is the process by which living things with beneficial traits produce more offspring, so their traits become more common over time.


Input: Consider Input: Question: If Mona is adjusting the pH levels of her fish tank and she makes the pH lower, what happens to the baseness of the water? 
 Answer: lower

Output: The higher the pH value is, the stronger the base.


Input: Consider Input: Question: The sun exerts gravitational force on all the planets, which has a higher gravitational force 
 Answer: earth


Output: The further objects are away from each other, the smaller the gravitational force.