The major difference between temperate rainforests and tropical rainforests is that

The major difference between temperate rain forests and tropical rain forests is that -

Temperate rain forest : Temperate rain forests are found along some coasts in temperate zones. These forests are cool. These forests are found on the Pacific coast of North America

Tropical rain forest : Tropical rain forest are found close to the equator and between the Tropic of Cancer and the Tropic of Capricorn. These forests are warm and moist. These are found in Central and South America, Africa, Asia and Australia. These are also called ever green rain forests.

answer; ///i believe that the correct answer is (d); ///

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."