Answer:

1.An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system

Some examples of ecosystems that are rich in diversity are: Rainforests. Forests. Large marine ecosystems. Marine ecosystems. Old-growth forests. Rainforests. Tundra. Forests. Old-growth. Coral reefs

2.Forests in general are known as ‘lungs of Earth’ because they absorb large amounts of carbon dioxide and release large amounts of oxygen due to photosynthesis.

3.The Four Main Layers Of A Rainforest. 1 Emergent Layer. The emergent layer of a rainforest. Image credit: Avigator Fortuner/Shutterstock.com. 2 Canopy. 3 Understory. 4 Forest Floor. 5 Part Of A Global Ecosystem

4.Coral reefs are found in more than 100 countries around the world. Most reefs are located between the Tropics of Cancer and Capricorn , in the Pacific Ocean, the Indian Ocean, the Caribbean Sea, the Red Sea, and the Persian Gulf.

5.Fringing Reefs,Barrier Reefs, Atolls.                                                       Fringing reefs. They are separated from the shore by a narrow, shallow lagoon.                                                                                                          Barrier Reefs similar to fringing reefs but are further away from shore often grow along the edge of the continental shelf.                                                An atoll is a type of coral reef with a coral rim that partially or completely surrounds a water body known as a lagoon. It is usually formed from a fringing reef around a volcanic island