How did African Americans help the Union during the Civil War?

When children heard an interesting story about a sympathetic and resourceful african-american child, the aim was to provide them with?

For 50 pointsfredrika's science teacher asked her to bring in three abiotic items from her backyard ecosystem. which of the following groups of items should she bring? a. a lightning bug, a plug of grass, and a wormb. a smooth rock, some red dirt, and an empty bird's nestc. a ladybug, a spider, and some water from a mud puddled. a caterpillar, a pine cone, and a piece of a robin's egg

Me fast do you think the outcome of this case would have been the same if president nixon hadclaimed national security needs rather than executive privilege? why or why not?