Question

How did airplane use change as World War I progressed?

Military forces became dependent exclusively on airplanes for fighting battles.
Airplanes became involved in active battle.
Fewer civilians took airplanes because of German threats.
Airplane use declined, as there were insufficient materials to build new planes.

Answer 1

Airplanes became involved in active battle.

Explanation: Early in WWI planes were used mainly for reconnaissance; as the war progressed they were armed and developed into fighters, bombers, and ground-attack aircraft, playing an active combat role.