Answer:
Hi! So what exactly do you need help with? If you want the whole thing helped with/done, nobody's going to do that whole thing for a measly five points... I suggest reposting it with a higher point prize.
Explanation:
Not completely sure, but maybe C.?
The answer is A. a light wave
C and D both need water as a medium and sound needs air to vibrate in order to travel. light, on the other hand, does not need a medium
I Think this is the cell cycle. S phase is the synthesis phase. It is the replication of the DNA and splitting of the cytoplasm.
