Final answer:
An earthquake can cause a tsunami by sending seismic waves through ocean waters.
Step-by-step explanation:
A tsunami is an enormous ocean wave that is primarily caused by an earthquake. The correct option is C. An earthquake can cause a tsunami by sending seismic waves through ocean waters. When an earthquake occurs under the ocean floor, it creates seismic waves that travel through the water, causing the water to move and creating a tsunami.
Learn more about the cause of tsunamis