Try not my best bud but you have a
Answer:
C: decreased tourism
Explanation:
If the river is polluted it don't exactly mean that diseases increase but, one thing for sure is that tourism will decrease.
One reason was that the Fugitive Slave Law that was part of the compromise of 1850 changed everything.
Answer:
immigration
Explanation:
migration is for animals, and immigration is for people.
Slaves were used in the American colonies to perform labor because A. there were not enough workers.
America needed workers, but there were not enough people willing to perform such difficult jobs for basically no money at all, which is why they brought slaves who had to work for free.