Question

1. earthquakes are caused by the movement of huge pieces of rock under earths surface. what is an effect of earthquakes?

tectonic plates move slowly.
energy is released.
tectonic plates get stuck against each other.

Explanation:

When tectonic plates move, they can get stuck. When they finally move, energy is released in the form of an earthquake. Tectonic plates moving slowly is a cause (not an effect) of earthquakes in some cases. Tectonic plates getting stuck is also a cause - when they are stuck, stress builds up, and when they move (release), that's the earthquake (energy release is the effect).

Answer:

Energy is released.