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.

[EX Q]: Question: If you spend a lot of time working out your muscles will be 
 Answer: larger
[EX A]: 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.

[EX Q]: Question: Alan has a rubber band on his hands. He pulls his hands apart and the rubber bands force 
 Answer: increases
[EX A]: The farther apart you move your hands, the stronger the force of the rubber band pulling your hands together.

[EX Q]: Question: An asteroid hurtled toward the planet Mars. The gravitational pull between the asteroid and Mars will be weaker 
 Answer: when the asteroid is far away
[EX A]:
Objects that are closer together have a stronger force of gravity.