On what evidence does he (gallagher) build his argument that a belief in color-blindness and a belief in meritocracy are both myths?.

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.

c is the answer to this question. altitude affects the weather because air molecules evaporate.