You have been asked to write an essay about the importance of the rainforest ecosystem. Which of the following contains the best thesis statement and supporting ideas for this essay? A. Thesis statement:
I personally believe that there is no more important cause than protecting rainforest ecosystems. Our planet would be a barren desert without them. We, as a society, need to rethink our everyday actions and work toward ending the destruction of these majestic halls of nature.
Supporting details:
More animals live in rainforests than you could dream of.
Some people say that the rainforests are the lungs of our planet because they are constantly "breathing in" carbon dioxide and "exhaling" carbon dioxide.
Over 289,000 square miles of the Amazon rainforest have been destroyed since 1978.

B. Thesis statement:
This essay will talk about the rainforest and why it's important.
Supporting details:
Rainforests are made of mostly trees and plants.
It rains most of the time in the rainforest.
Many animals live in them.

C. Thesis statement:
Rainforests are essential to our planet, but they are being destroyed by deforestation at an alarming rate. Society needs to become informed about the value of these precious ecosystems.
Supporting details:
Rainforests counteract global warming by reducing the amount of solar radiation reflected into the atmosphere.
Pollution is filtered because the rainforest absorbs carbon dioxide.
They are critical habitats for a wide range of animals and plants.

D. Thesis statement:
Rainforests are one of Earth's most important ecosystems. I think it's a good idea to protect them.
Supporting details:
Rainforests have a lot of natural resources.
There are four layers in the rainforest ecosystem.
Rainforests can have anywhere from 80 to 430 inches of rain each year.