Rewrite the student passage using the usage rules discussed in this lesson.

Answer:

My brother and I have always been interested in nature. We like to go outside and look at the plants and animals that live in the woods behind our house. My brother wants to be a biologist and study how animals interact with their environment. He wants to know how pollution affects their health. It is hard to believe he will be leaving for college soon. It will be different without him around.