During the period 1901-1920, most legal immigrants into the united states were from

Eastern and Southern Europe

Explanation:

19th Century Migration to the United States This figure grew to 14.5 million between the years 1901-1920. Most of these new immigrants came from Eastern and Southern Europe. Coming from Europe, Asia and Latin America, these immigrants would transformed the demographic make up of the nation.

i think they would live in caves or natural tunnels

c 3 branches because idk why they had 3 well when:

you think of it there are still contrys with 3