In the 1850s, Chinese immigrants established Chinatowns in cities. mainly on the western coast of the United States.

mainly on the eastern coast of the United States.

primarily in the midwestern United States.

primarily in the southern United States.

Mainly on the western coast

Explanation:

option A on edge2020

A. Mainly on the western coast of the United States.

Explanation:

In the 1850s, Chinese immigrants established Chinatowns in cities mainly on the western coast of the United States.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.