Cows are they poop out methane
The answer to your question is D. because fossil fuels are natural substances found in nature.
Attempt to gain the ability to predict what offspring will look like
Answer:
Amino acids are the structural units (monomers) that make up proteins. They join together to form short polymer chains called peptides or longer chains called either polypeptides or proteins. These polymers are linear and unbranched, with each amino acid within the chain attached to two neighboring amino acids.
Explanation: