Which number represents the area known as the great barrier reef?
a) 1
b) 2
c) 3
d) 4

How did rhe transcontinental railroad effected westward migration

What determines the properties of a mineral

Which statement about african americans during the civil war is true? o a. they were granted the vote in the north. o b. they were allowed to attend northern universities. c. they were given deeds to southern plantations. o o d. they enlisted in the union army.