In 1820 the cotton production in the us was sparse. what triggered the increase in cotton production?

What triggered the increase in cotton production was the invention of the cotton gin by Eli Whitney.

Explanation:

A cotton gin is a cotton seed separator for which its inventor, Eli Whitney, was granted a patent in 1794. As a result, in the 19th century, the United States became the world's largest cotton producer. Already in the process of cleaning the crops, the cotton fiber is separated from the seeds. In a short fiber species, there may be three kilograms of seeds per kilogram of cotton.

The cotton gin mechanizes this process of producing a raw pump. After cleaning, the raw pump is baled for transport. In the cotton spinner, the bales are opened, the cotton is cleaned in a grater and then carded to get the fibers in the same direction before spinning.

d)to gain support for the independence movement.

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