Which process involves carbon moving directly from the biosphere into the geosphere?

1 the decomposition of plants on the forest floor
2 the decomposition of plants on the forest floor

3 the photosynthesis of a plant

4 the eruption of a volcano

the weathering of rocks by a river

The correct answer is 4 the eruption of a volcano. In this process, carbon is released from the Earth's interior during volcanic eruptions and is then transferred directly from the biosphere into the geosphere.