What was Immigration like in America in the 1920's

During the 1920s, immigration trends in the United States changed in two ways. First, the numbers leveled out and then fell dramatically—fewer than 700,000 people arrived during the following decade.

Explanation:

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.