Two factors that defined rainforests are:
- There must be 69-78 inches of rain per year
- The rain must be distributed throughout the year.
What defines the rainforest?
A rainforest is an area of tall, mostly evergreen trees and a high amount of rainfall. Rainforests are Earth's oldest living ecosystems, with some outlasting in their present form for at least 70 million years.
Thus, option "B" and "D" is correct.
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