A large number of species are found within a small unit of area of

Q. A large number of species are found within a small unit of area of :

1. mangrove coastal forests
2. coniferous temperate forests
3. deciduous monsoon forests
4. wet evergreen equatorial forests

Answer: wet evergreen equatorial forests

The tropical regions of the Earth are between the Tropic of Cancer and the Tropic of Capricorn in a band of straddling the equator. Forests in the tropical regions can be evergreen or deciduous. In the evergreen tropical forests, a range exists based on precipitation. Tropical rainforests receive enormous amounts of rain all year. Drier tropical evergreen forests receive seasonal rain. The types of animals in both kinds of forests vary, but both boast rich species diversity. Tropical rainforests alone house over half the Earth’s animal species.

Tropical Evergreen Forests

---

Found in the Tropics (23.5° N - 23.5° S) hence called Tropical. 

Evergreen, means that they do not shed leaves seasonally like Deciduous trees that they are always green. They occupy about seven percent of the earth's land surface and harbours more than half of the world’s plants and animals. They are also Called as “Selvas” .