The great rift valley forms through a series of rifting.
There is no difference. Just Rift Valley is shorter to say>
The Great Rift Valley was formed by plate tectonics.
yes
Ethiopia-Kenya-Uganda-Tanzania
The Great Rift Valley was caused by the edges of two tectonic plates, not by a river. There are rivers in it, though, notably the River Jordan, in the north, which flows into the Sea of Galilee and...