Final answer:
The Ring of Fire is a zone of frequent earthquake and volcanic activity that encircles the Pacific Ocean.
Step-by-step explanation:
The correct answer is a) Ring of Fire. The Ring of Fire is a zone of frequent earthquake and volcanic activity that encircles the Pacific Ocean. It is marked by a horseshoe-shaped line drawn around the rim of the Pacific Ocean.
This zone is known for generating countless tsunamis and is associated with the movement of tectonic plates.