Threatened and endangered species are those plant and animal populations facing extinction. Often, this is a result of human activity. Certain animals depended on truffula trees. Name the animals. Explain why these animals needed truffula trees.
Interdependence is an important characteristic of the environment.
For example, a byproduct of sawing wood is sawdust. Sometimes byproducts are useful. Name two byproducts that resulted from making thneeds. Check the line beside the answer of your choice. I can't decide.