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: An object with a lesser mass than another will have _____ momentum. 
 Answer: less
Example Output: An object has greater momentum if it has greater mass, greater velocity, or both.

Example Input: Question: A farmer, using old fashioned farming practices, can expect to grow _____ crops. 
 Answer: less
Example Output:
More advanced farming practices allowed a single farmer to grow food for many more people.