What were two things that women proved through their heroic service in World War 1?

Women did "war work" like working in machine shops and armament plants another thing women did was contribute in more traditional ways including organizing drives to sell war bonds or getting donations to the people that have been hurt by the war.

Women showed that they could be useful during the war effort and that they deserved to be treated as equals

Explanation:

Many women worked at factories making bullets and many times taking jobs that men leave to go to war. They were also drafted to work in many supporting jobs during the war, such as nursery, for example. In Russia, some even participated in Combat.