Question

Both earthquakes and volcanoes are a result of _____.
the Sun's energy
plate tectonics
subduction
seafloor spreading

Answer 1

Answer is plate tectonics

Answer 2

For sure, one of the answers is Plate tectonics. The second answer would most likely be subduction, due to the fact, in the lessons revolving this question, it mentions both earthquakes and volcanoes caused by subduction.