What was jacob riis’s goal in the late 1800s? to expose corruption in city governments to start settlement houses for the less fortunate to preach a gospel of social justice for the less fortunate to make americans aware of problems in cities

I think that the answer will be the last one.  His goal was to make Americans aware of problems in cities.  Hope this helps!

to regulate production on things such as fuel and production

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.