Final answer:
When a volcano erupts, it interacts with the Atmosphere, Lithosphere, and Hydrosphere.
Step-by-step explanation:
When a volcano erupts, it interacts with the spheres of the Earth, specifically the Atmosphere, Lithosphere, and Hydrosphere. When a volcano erupts, particles of rock and ash are released into the atmosphere. These particles can alter the composition of the atmosphere and potentially impact weather patterns. Additionally, water droplets form around the rock and ash particles and fall to Earth as rain, which provides water for plants and contributes to the hydrosphere.