Final Answer:
Most earthquake activity in Hawai'i is associated with Volcanic activity. The islands are formed by hotspots, where magma causes seismic activity, making volcanic processes the primary driver of earthquakes in the region. so, the correct answer is B. Volcanic activity.
Step-by-step explanation:
The primary cause of earthquake activity in Hawai'i is associated with Volcanic activity. The islands are formed by hotspots, where magma from the Earth's mantle rises to the surface, creating volcanoes. As magma moves and pressure builds up, it can lead to seismic activity, resulting in earthquakes. While some earthquakes may be related to tectonic plate movements, the predominant factor in Hawai'i is the volcanic activity originating from the hotspots.
Therefore, the correct option is B. Volcanic activity, as it is the major driving force behind most earthquake occurrences in Hawai'i.