Question

Native Americans from the southeastern part of ___is now the

Answer 1

先找到句子主干：Native Americans believed that the universe was made up of three worlds.

from the southeastern part of the United States是用来修饰前面的native Americans的

of which is （now）the United States 省去now更容易看一些

the southeastern part 就等于United States; 表地点用where,等于of which