Question

world war i home front
political effects of the war
what did the espionage act do?
i pledge
allegiance
and
silence
increased the number of spies used in the u.s.
military
required citizens to spend time listening in to enemy
communications
criminalized spying and activities harmful to the
united states

Explanation:

The Espionage Act of 1917 was intended to criminalize actions that could harm national security, like spying or activities against the US. The first option is incorrect as it didn't focus on increasing military spies. The second is wrong as citizens weren't required to listen to enemy communications. The third option matches the Act's purpose of making such harmful activities illegal.

Answer:

criminalized spying and activities harmful to the United States (the third option)