i need help with my homework?

Question

what does historiens call the movement of people plants animals and germs that resulted from these expidetions its hard?

Answer 1

Unclear question. You did not mention WHICH expeditions? There have been hundreds of expeditions from place to place. Some happened at the beginning of civilization, some in the Middle Ages, and others when we decided to find ways through the Arctic. Each one had different consequences.

We need more info to help you.