Answer:
C. Protein
Explanation:
Proteins contain C, H, O, and N.
Most notably, they contain an R group (aka a side chain), which is different for each for amino acid. The R group is symbolized by the letter R in the image.
Answer:
Iv and
Ii
Explanation:
I think they are the main function of human skeleton system.
Geology is the study of the earth and meteorology is the study of the earths atmosphere