I believe 1,2,3 are correct.
Answer:
Long staple cotton was profitable because the cotton fibers could be easily separated from the seeds. ... While reducing the number of slaves needed to grow cotton the cotton gin greatly increased the areas where cotton could be profitably grown. This increased the demand for slaves.
Legislators make laws, so you could do something about that.
Answer:
Global interaction refers to the ability of people to communicate all over the globe, no matter what positions they are occupying.