Name two ways rock layers can change

the answer is otpion c) understanding

he wants to be heard one more time. he wants to be understood. he needs the truth one more time.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.