instruction:
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.
question:
Question: If you defocus the sun's rays with a lens they are 
 Answer: weaker
answer:
The more focused the Suns rays are, the more energy an area receives and the warmer it is.


question:
Question: When we let a rubber band relax to a small size, it is easy to stretch meaning it has 
 Answer: less resistance
answer:
The farther you stretch the band, the greater the resistance is.


question:
Question: We need oxygen masks when we climb Everest because the air pressure is 
 Answer: low
answer:

Air pressure is less at higher elevations.