Question

tropical evergreen forests are also known as tropical

Answer 1

tropical evergreen forest are evergreen . it is called tropical evergreen forest because there is never a time of year when the trees have no leaves.
hope that it helps you .
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Answer 2

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All the trees of these Forests do not shed their leaves at the same time. Hence, the forest always appear green. That's why , such forest are known as Evergreen forests.