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: If Mona is building a machine to help her vacuum her floor and she decreases the amount of force the engine inside the vacuum, what happens to the vacuum ability to make work easier?
Answer: decreases
Example Output: Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied.

Example Input: Question: An increase in food will likely lead to _____ lifespans.
Answer: longer
Example Output: New farm machines were invented. They increased the amount of food that could be produced. With more food, people were healthier and could live longer.

Example Input: Question: Dan is snapping a rubber band at Sarah. He stretches the band as much as he can before he snaps it this time, which will mean its potential energy is
Answer: large
Example Output:
The more an elastic object is stretched or compressed, the greater its elastic potential energy is.