3. One reason the Tigris and Euphrates, the Nile, and the Indus river valleys supported the earliest civilizations was because these regions contained *
O 1. Considerable rainfall and dense forests
2. Plateaus that provided means of transportation
0 3. Fertile soil, annual flooding, and irrigation
4. Rich deposits of oil and iron

answer; i believe the two groups were irish immigrants and chinese immigrants;

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.

where's the

answer; /// i believe the correct answer is (oasis)