This question is rather vague, but there are many different things you can learn about Earth's history though the study of animals. For example: you can look at the fossils of dinosaurs and learn how they lived, their size, what era they were from, etc. If you are looking at live animals, you can determine how they live with the environment around them.
Answer:
A code talker is the name given to American Indians who used their tribal language to send secret communications on the battlefield.
Explanation:
The subject is who performs the action indicated by the verb in the sentence. So you can find the subject by asking who to the verb. In this case the question is who are on this elevator, whose answer is too many people. That is the complete subjec. The simple subject is the main word of the subject; it does not include the modifiers. So <span>the simple subject is people.</span>
