Question

Which of the following can be determined through the examination of fossils?

The reason monarch butterflies migrate across North America

The existence and characteristics of extinct dinosaurs

The mating habits of praying mantises

The ways large mammals use sounds and smells to communicate

Answer 1

C and D can be immediately eliminated because the behavior and habits of an animal cannot be determined accurately through fossils. A would be hard to know unless additional things were studied. 

B is left. Fossils can prove the existence of dinosaurs, and they can be used to determine their characteristics.

ANSWER-B-The existence and characteristics of extinct dinosaurs