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: When we get to the bottom of a mountain the air is 
 Answer: more dense
Example Output: At higher elevations, there is less air to press on a given area.

Example Input: Question: If Jim lowers the temperature of water in his bathtub, what happens to the density of the water? 
 Answer: increases
Example Output: Water becomes more dense when it is colder and when it has more salt.

Example Input: Question: Derek is noting how close particles are, and sees that they are very far apart. Since the particles are so far apart, the amplitude of the wave will be 
 Answer: lesser
Example Output:
The closer together the particles are, the greater the amplitude of the wave.