Why was irrigation important to Sumer? A.)It led to the invention of the sail.
B.)It helped create food surpluses.
C.)It led to trade with other city-states.
D.)It moved water from mountains to city-states.

It helped create food surpluses

Explanation: irrigation is about crops, it's to help grow crops where they wouldn't be able to otherwise. So it would help create food surpluses if they were growing more crops.

economic

abolish

do away with

unanimous

in complete agreement

secede

separate; break free

inauguration

starting a new position with a formal ceremony.

cooperationist

people who wanted the north to cooperate with the south

surrender

to give up

volunteer

perform a service for free

draft

involuntary service in military

retreat

withdraw; move away from enemy

advisor

expert who gives advice

explanation: