Which describes the way a convection current moves

When magma reaches the top, it cools from the crust, it sinks back down to the core. Just like the water, the magma usually goes in a circular motion going up and down. Convection current is what moves plate tectonics/the crust.

explanation:

areas w steep slopes, west coast, rocky mountains, and appalachian mountains

b.transmitters send radio waves, and receivers capture radio waves.