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 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

Ex 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.

Ex Input:
Question: If you defocus the sun's rays with a lens they are
Answer: weaker

Ex Output:
The more focused the Suns rays are, the more energy an area receives and the warmer it is.

Ex Input:
Question: An increase in body size will cause a concomitant _____ in its surface area to volume ratio.
Answer: decrease

Ex Output:
Size restriction: The final body size is limited because as the body size increases, the surface area to volume ratio decreases.