What natural phenomenon is often referred to as a "lava mountain"?

A volcano is often referred to as a "lava mountain" because it is a geological structure formed by the accumulation of eruptive materials such as lava, tephra, and ash. When magma from beneath the Earth's crust escapes to the surface, it typically erupts through a vent, which then leads to the buildup of volcanic rock over time. As lava flows accumulate and solidify, they create a mountain-like structure, resulting in what we see as a volcano. Different types of volcanoes can vary in shape and size, influenced by the viscosity of the lava and the nature of the eruptions, but they all fundamentally share this characteristic of being a mountain formed from volcanic activity.

The other options present different geological occurrences. Earthquakes are the shaking events caused by tectonic movement; tsunamis are large oceanic waves usually triggered by underwater earthquakes or volcanic eruptions; and a mountain range is a series of mountains that are connected and formed through tectonic processes, but they are not specifically related to volcanic activity like a volcano is.