Science fill in the blank. ! urgent!

Which of the following is a source of heat for magma formation? magma plumes in the continental crust friction due to divergence friction due to subduction magma plumes in the oceanic crust

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false