HELP i dont know this

Why was frederick douglass encouraged by the dred scott decision?

Situation #1: imagine that you are a free black male living in columbus, oh in 1863. you have seen the recruiting poster and have been thinking a lot about whether or not to enlist in the union army. write a one-page letter (double spaced) to your mother telling her of the decision you have made about enlisting (or not enlisting). be sure to explain the reasons that caused you to make the decision.

Which features are created on the exterior of a volcano when it erupts? check all that apply. vent crater hot spot lava flow boundary