Answer:I believe the answer is A
Explanation:
B and C have nothing to do with how the sun helps or is a necessity. D only talks about the life span of the sun not how it is necessary for the earth. A is the only answer that makes sense because it gives examples on how the sun helps the earth as well as human kind.
Answer:
C.
Explanation:
I don't really know why. I just googled it and it said...
the number of times a machine multiplies the effort force: mechanical advantage
Hope this helps
A) Transcription makes RNA from DNA, translation turns RNA into proteins.