Habitat climate,warmer temperatures and increased radiation Hope this helps
An estuary is where salt water and fresh water meet. Estuaries are usually found at the edge of the coast, where the ocean water, or salty water, meets river, lake, any fresh water source, water.
A tributary is something completely different. It is a, usually smaller than the main river or lake, river/stream stemming off a bigger river or lake, or flowing into that river or lake.
It is because the Americans started to see all the other countries become free and they wanted to become free to. They also started to not like the way the British treated them.
