On several occasions in earth's history, huge numbers of volcanoes have erupted. these eruptions have sent particles into the air that blocked sunlight to plants, possibly causing the extinction of some species. which "spheres" interacted in these situations?

The answer is; atmosphere, geosphere and biosphere

The geosphere spews dust and pyroclasts into the atmosphere through the volcanic activity.  In the atmosphere, the dust and gases from the volcano mix with the weather elements and cause phenomenon such as acid rain. This poses a risk to the population of the biosphere because the dust persist in this atmosphere and blocks the sunlight required by primary producers-who are at the base of food chains.

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.

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