Conservation and recycling were
during world war ii

The correct answer to this open question is the following.

Conservation and recycling were important during World War II.

During wartime, the federal government of the United States asked its citizens to take of food and other stuff because supplies had to be sent to the war front to replenish the troops. Indeed, the US government asked its citizens to create food gardens in their backyards to grow crops such as fruits and vegetables to have more food because it was needed. They were called Victory Gardens. This example was followed by other countries.

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.

explanation: j