Which geological feature typically contains a lot of volcanic activity?

Seamounts and Guyots are underwater mountains formed by volcanic activity. Seamounts are typically steep and rise significantly from the ocean floor but do not reach the surface, while guyots are flat-topped seamounts that have been eroded over time. The formation of these features is closely associated with volcanic hotspots or rifting zones where magma from the Earth's mantle escapes to the surface. This volcanic activity is responsible for building these underwater structures through the accumulation of volcanic material.

In contrast, ocean currents, abyssal plains, and oceanic plateaus do not inherently involve active volcanic processes. Ocean currents are primarily movement patterns of seawater driven by wind and the Earth's rotation. Abyssal plains are flat, deep areas of the ocean floor that form from the settling of sediments over time and are generally not associated with volcanic activity. Oceanic plateaus can sometimes have volcanic origins, but they are more related to the horizontal buildup of material rather than ongoing volcanic activity. Thus, the nature of seamounts and guyots directly correlates with significant volcanic presence, making them the correct choice in identifying features typically characterized by active volcanism.