One of the major effects of the introduction and widespread usage of eli whitney’s cotton gin was that

Demand for slaves grew

Explanation:

This was one of the effects of the introduction and widespread usage of Eli Whitney's cotton gin. The main effect of the cotton gin was the fact that it greatly reduced the time needed to process cotton. Because of this, cotton became a much more profitable business, and larger plantations developed. The large plantations required a very large workforce, which led to the use of more slaves in order to address this need for labor.

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation: