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: Rick had a rock (Rock A) from 1000 feet beneath the crust's surface. He later dug 3000 feet deeper and got a second rock (Rock B). Which rock is likely older?
Answer: Rock B
Example Output: Older rocks are at the bottom and younger rocks are at the top.

Example Input: Question: Two small suns moving closer will have _____ gravitational force between them than two large suns.
Answer: less
Example Output: The greater the mass of the objects, the stronger the gravitational force of attraction between them.

Example Input: Question: If Ben exercises daily, and Anna exercises only weekly, who has a stronger heart?
Answer: Ben
Example Output:
When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction.