What did eli whitney invent that changed slavery in the us?

List three reasons why explorers began to explore new, and old areas. [[ps: doesn't explicitly say where. i think it's more in general.

The zealots were jews who believed a: they should fight the romans c: they should set up a new country b: they should accept roman rule d: religious law must be followed asap i'm taking a test

What river systems the worlds earliest known civilization develop ?