Which former slave became a conductor on the Underground Railroad and was known as the "Black Moses"?

In a repredentive democracy: a.) people come together in large meetings to vote on public policy b.) the people govern themselves c.) political power is held by a small group of people d.) people elect officials to run the government for them

Describe how ocean currents can affect a moving object ❕❕❕

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies?