I'm not sure what you're asking, but if you're looking for a word to describe this change its "mutation"
Answer:
I believe the answer is C.
Explanation:
This is because the basketball is the bigger object here so that should represent something bigger like the solar system. Then the tennis ball would represent earth because it is the smaller object here.
It is important because it creates a second copy of DNA that must go into one of the two daughter's cells when a cell divides
I believe they use enzymes