What spheres are interacting when a volcano erupts and releases gases into the air?

When a volcano erupts and releases gases into the air, the interacting spheres include the lithosphere, which encompasses the Earth's crust and the volcanic material; the atmosphere, where the gases disperse; and the biOSphere, as the released gases can affect living organisms and ecosystems. Additionally, the eruption can impact the hydrosphere if volcanic materials enter bodies of water, potentially altering water quality and habitats. These interactions highlight the interconnectedness of Earth's systems during volcanic events.