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: A car that is very heavy will accelerate 
 Answer: slower
Example Output: The greater the mass of an object, the less it will accelerate when a given force is applied.

Example Input: Question: People usually go snow skiing in the mountains because higher altitudes are _____ and are more likely to have snow. 
 Answer: colder
Example Output:
Glaciers often form in the mountains because higher altitudes are colder and more likely to have snow that falls and collects.