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: Mike needed to get a dark picture . In order to get the darkest photo, Mike made the exposure 
 Answer: shorter
[EX A]: The longer the exposure, the more light that the telescope can gather to make the image.

[EX Q]: Question: Fred found a longitudinal wave. The particles are getting further apart. The amplitude is 
 Answer: decreasing
[EX A]: The closer together the particles in a longitudinal wave are, the greater the amplitude.

[EX Q]: Question: John was watching the particles as they interacted with each other. He found that the lower the pressure, the collisions were 
 Answer: Lower
[EX A]:
More particles inside the container means more collisions, and more collisions mean a higher pressure.