I think it is b because since it refers to climate vegetation it could be b mostly other answers dont make sense
<span>Ocean currents act much like a conveyer belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.</span>
<span>D. Overcrowding and destruction of rain forests</span>
Presumably journalism or science...