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 Mona is bouncing radar waves off a test car when training to be a policewoman and she notices the frequency of the waves returning to her radar gun is lower then it was before, what is happening to the car she is pointing the gun at? 
 Answer: decreasing in speed
[EX A]: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.

[EX Q]: Question: When quarks are taken further apart, they experience minimal attraction, but when they're brought together, they have an attraction that is 
 Answer: smaller
[EX A]: Gluons make quarks attract each other more strongly the farther apart the quarks get.

[EX Q]: Question: Jeff is stopping exercising his muscles at home. Over time his muscles will grow 
 Answer: smaller
[EX A]:
Muscles that are exercised are bigger and stronger than muscles that are not exercised.