By 3000 b. c.e. traders from visited the northern coasts of new guinea. some of them settled there, while others continued exploring and establishing communities in pacific archipelagos

4.a depression is the answer

The embargo act of 1807  was a law passed by the united state congress and signed by president thomas jefferson on december 22,  1807. it prohibited american ships from trading in all foreign ports. in 1806, france passed a law that prohibited trade between neutral parties, like the u.s., and britain.

He issued the emancipation proclamation. it started changing slavery, and eventually lead to the freedom of slaves.