Why did some early humans settle near estuaries?
a they provided protection from rival groups and
shelter for homes
b they mostly occurred in areas with mild climates
and few wild animals
c there was little danger of excess water or flooding
in these areas
d they provided both salt water and fresh water
along with fertile land

B: They mostly occurred in areas with mild climates.

Explanation:

Due to the mild climates if the water was available, and the soil was fertile, they found a place where they can stay and live.

a, both were musicians during the jazz age

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;