Question

unit exam - earth systems
where do earthquakes most commonly occur?
only in the ocean
along tectonic plate edges
randomly around the world

Explanation:

Earthquakes occur due to the movement of tectonic plates. The edges of these plates are where stress builds up and is released as earthquakes. Oceans are not the only location (earthquakes can happen on land too), and they are not random but follow plate - boundary patterns.

Answer:

along tectonic plate edges