What were these propaganda posters encouraging United States citizen to do?

The development of humans was directly dependent ondevelopment of a language.development of communication between people.e development of tools.litdevelopment of the wheel.

Which events are correlated but do not necessarily have a causal relationship?

He electoral vote is tied between two presidential candidates. what happens next? the house votes to determine who wins the presidency. the senate votes to determine who wins the presidency. the presidency is decided by the supreme court. the presidency is decided by the popular vote.