Gravity is what holds the universe together, gravity gets help from the solar system and planets and the stars and all together if holds the planets in orbit around the sun and moon
I think its D. but im not sure.. i might be wrong
Answer:
Protein
Explanation:
A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many essential biological compounds such as enzymes, hormones, and antibodies.
