Which of the following best explains why trade among the colonies flourished? The different regions specialized in different crops. The colonies had developed large fleets of trading ships. Existing trade routes were well-maintained by Native Americans. Colonies were founded with specific trade agreements in place.

Colonies were founded with specific trade agreements in places.

not the first because its more for overseas. not the second because they werent on good terms with the native americans.

Its called specialization. Its because it was easier and cheaper for each colony to produce what was more better for them. So one place that didnt have a lot of lumber could trade something with the lumber colony didnt have with them. It makes thing way more efficient. Instead of wasting engery of a lot of things, you specialize, get good at something and trade for everything else.