How did empire building benefit farm production?
a. by reducing population pressure
b. by providing more labor resources
c. by expanding trade alliances
d. by making available fertile flatlands
(d my answer)

The answer from the given choices is "B", "Providing more labor Resources".

Empire building benefits farm production by providing more labor resources. As more labor resources means more hands on farm production which ultimately will make the process faster generating more benefits. An empire also allowed people to interact in better ways increasing mutual co-operation.

it's not the readmission

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.