Zoologist study certain animals or what the the animal does. It can be any kind of animal. They can travel to different parts of the world for different types of animals.
Cops help people in many different ways like when they pull you over for speeding they don't want you to get in an accident, or if you have a tail light out or a head light. When there is a robber they try there best to get them.
Nascar Drivers make a lot of left turns. they make a lot of money, and they go fast. But it can be very dangerous, because they are going fast and crashing can be life threatening.