Which two elements make up the most common compound in the human body?
A. Hand o
B. Cand H
C. N and o
D. P and Ca

A. H and O

Explanation:

Which two elements make up the most common compound in the human

body?

A. Hand o

B. Cand H

C. N and o

D. P and Ca

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

the answer is trees if i'm not mistaken