What was used for transferring water to dry places in Mesopotamia? Aka:

provided the key to successful farming in Mesopotamia where little rain fell.

(I truly can't seem to find the answer, I feel like i'm skipping over something...)

Read each statement and decide whether it applies to ellis island, angel island, or both: 1. most immigrants were from china or another asian nation. 2. immigrants had to pass health inspections before being admitted to the united states. 3. immigrants could be denied entry or sent back to their home countries.

Explain how zollverein, a tariff agreement, to unite the german states.

What affected the second industrial revolution have on transportation