The vertical movement of water, laden with nutrients, carried up from the seafloor to the ocean surface is called O a tidal bore
O a tidal wave
O an upwelling
O a rogue wave

answer; polycythemia is the correct answer;

b ti isnfornopgnoernfrof

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