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.

[Q]: Question: When a rubber band is relaxed, its elastic force 
 Answer: decreases
[A]: The elastic force increases the more the material is stretched or compressed.


[Q]: Question: A stream going down a mountain will have to do _____ cutting. 
 Answer: much
[A]: In erosion, the higher the elevation, the farther the stream is from where it will reach base level and the more cutting it has to do.


[Q]: Question: Will's pupils grew smaller as the day grew brighter. This happens to let _____ light in. 
 Answer: less
[A]:
The pupil automatically gets bigger or smaller to let more or less light in as needed.