Read the following paragraph. the underlined sentence is the main idea of the paragraph. which sentence can be added to the paragraph as supporting evidence for its main idea? it is our responsibility to save forests because we are dependent on them. forests are an important part of the earth’s ecosystem. they maintain the oxygen levels in our atmosphere. they shelter many animals and are home to a wide variety of trees. but even beyond that, they are important for the survival of the human race. since the beginning of time, our ancestors lived and survived in the forests. even today, some human tribes can be found in forests. most tribal communities depend on forests for their livelihood. their survival is deeply connected to the health of the forests. in fact, all of us human beings are ultimately dependent on forests for our survival. a. many rare and endangered types of animals live in the forests. b. the yanomami people of brazil get their food and shelter from the amazon forests. c. forests are in danger because they are being cut down in many countries. d. forests are an important part of the cultures and traditions of many countries.