What do pinocytosis and phagocytosis have in common? A) They are both forms of endocytosis.
B) They are both types of passive transport.
C) They both involve the movement of liquids.
D) They both move particles toward the extracellular space.

climate change and pollution

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds