The maya and aztec civilizations existed before the europeans arrived.

Awatershed is a piece of land that drains water into a particular stream, lake, or river. which of the following factors often negatively impacts the water quality in a watershed? a.) wetlands b.) pollution c.) irrigation d.)rainfall

In what three areas is the us leader?

The action of eventually a low island to form. a. wind b. waves c. volcanoes d. tectonic plates