What is true of both earthquakes and volcanoes?
a. they are caused by movement of tectonic plates.
b. they are potentially devastating to local environments.
c. they occur inland less frequently than along coasts.
d. all of the above are true of both earthquakes and volcanoes.

The correct answer is D) All of the above are true of both earthquakes and volcanoes.

What is true of both earthquakes and volcanoes is that they are caused by the movement of tectonic plates, they are potentially devastating to local environments, and they occur inland less frequently than along coasts.

Let's punt the example of an earthquake. Many spots on earth are prone to earthquakes and major risks for people living in these regions. An earthquake is a major shaking on the surface of the earth. The outmost layer moves, provoking the shaking. The tectonic plates are in constant movement and shifting causing stress that leads to faults, or cracks.