Answer:

1. what is an ecosystem?

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

What are examples of diverse ecosystem?

An example of ecological diversity on a global scale would be the variation in ecosystems, such as deserts, forests, grasslands, wetlands and oceans.

2. what is a rainforest?

A rainforest is an area of tall, mostly

evergreen trees and a high amount of rainfall.

Why is rain forest known as " the lungs of the earth?

Tropical rainforests are often called the “lungs of the planet” because they generally draw in carbon dioxide and breathe out oxygen. But the amount of carbon dioxide they absorb, or produce, varies hugely with year-to-year variations in the climate.