The institution of slavery became even more entrenched in the South because of the increasing importance of .

Cotton

Explanation:

Due to the increased demand for British textiles products, which in turn was heavily based on the cotton production of the American colonies in the 19th century. This made the demand for slavery for the cultivation of cotton in the Southern part of the United States to increase as well.

Hence, the institution of slavery became even more entrenched in the South because of the increasing importance of COTTON

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