As immagrants arrived from many nations, why did it become necessary to restrict who and how many came to America

Brainliestttme : ) describe the event: increase in islamic extremism in the middle east

Plz the 10 places that charles darwin stopped at to report his findings, and include dates?

Which two statements are true about native american tribes during the civil war? the war caused native american tribes to sign treaties and side with union forces who promised to develop indian territory. the war united the tribes against the confederacy, which wanted to secede from the union and continue slavery. the war created conflicts within the tribes because some wanted to stay loyal to the union, while others wanted to support the confederacy. the war made the tribes forget their differences and come together against the union forces who wanted to abolish slavery in indian territory. the war led native american tribes to sign treaties with the confederacy, which promised to protect the tribes and their interests in exchange for support in the war.