Which component is part of the composition of a volcanic eruption?

The composition of a volcanic eruption includes lava flow, gases, and pyroclastic material, making this answer the most comprehensive and accurate representation of what occurs during such an event.

Lava flow refers to the molten rock that erupts from a volcano and can create new landforms as it cools and solidifies. Gases released during an eruption can include water vapor, carbon dioxide, sulfur dioxide, and others, playing a critical role in the eruption process and impacting the environment. Pyroclastic material consists of ash, pumice, rock fragments, and volcanic gases that are ejected explosively during an eruption, posing hazards to nearby areas due to their speed and temperature.

In contrast, while sand and gravel, water vapor only, and metamorphic rocks may relate to geological or hydrological processes, they do not encapsulate the key components involved specifically in volcanic eruptions. Sand and gravel can be associated with sedimentary environments, water vapor only does not reflect the variety of gases emitted, and metamorphic rocks arise from the alteration of existing rocks under heat and pressure, which is unrelated to the eruption itself.