Answer:
It is not known for sure why they were extinct, many scientists believe that extinction was due to hunting, while other scientists believe that extinction was due to climate changes that destroyed the vegetation that these animals ate.
Step-by-step explanation:
Mastodons and mammoths were animal-like elephants that inhabited the Earth in large groups, thousands of years ago. Scientists are not sure why mastodons and mammoths have disappeared. It may have been because of climate change in the environment in which they lived. Experts believe that the weather began to cool and thick ice sheets covered vast areas. This put an end to the pastures in which these animals lived and fed. On the other hand, other scientists agree that they were extinguished by the hunt made by the human being in search of meat.