Question

what primarily causes the ground to shake during an earthquake?
a atmospheric pressure changes
b human activities on earths surface
c volcanic eruptions in earths crust
d movement of tectonic plates in earths outer shell

Explanation:

Earthquakes mainly occur due to the sudden release of energy when tectonic plates in Earth's outer - shell move and interact at their boundaries. Atmospheric pressure changes, human activities, and volcanic eruptions are not the primary causes of most earthquakes.

Answer:

D. movement of tectonic plates in Earth's outer shell