I believe the answer is "The oldest Earth rocks are 3.9 billion years old."
Answer:
this is bases
Explanation:
because, acids chemical reaction , there is no 2 written when writing an acids chemical reaction
A) G1; S; G2 and then M
It is the correct order ; if you need specification on all phases comment !!
This is true because just like the human body, our organs depend on one another