1. The best description is that the cotton gin made growing cotton very profitable and increased the demand for slave labor. Thus option 4th is correct.
2. The both the machines contributed in the growth of textile industry. Thus, option 2nd is correct.
What is Cotton ginning?
Cotton ginning refers to the removal of the cotton balls from the cotton plants in the fields. It is septation of the fibers from the seeds.
The invention of cotton ginning benefited the owners by increasing their revenues and increasing the amount of slave labor they required.
The Inventions of both the machines were of great relevance to the growth of the textile industry, making the manufacturing process of textile much more efficient.
Therefore, it can be concluded that option 4th and 2nd are correct of first and second part of the question.
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