Which process involves carbon moving directly from the biosphere into the geosphere? (1 point) the photosynthesis of a plant the decomposition of plants on the forest floor the weathering of rocks by a river the eruption of a volcano

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1. The biosphere is the zone of life, including all organisms, while the geosphere consists of the solid parts of the Earth such as rocks and soil.  
2. In photosynthesis, a plant takes in $$ 	ext{CO}_2 $$ from the atmosphere (part of the biosphere) and converts it into organic matter, so this process does not directly move carbon into the geosphere.  
3. Weathering of rocks by a river is a process that breaks down rocks (geosphere) but does not involve the direct transfer of carbon from living organisms into the geosphere.  
4. An eruption of a volcano releases carbon from the geosphere (mantle and crust) into the atmosphere, not from the biosphere into the geosphere.  
5. The decomposition of plants on the forest floor involves the breakdown of organic matter (from the biosphere) that becomes part of the soil organic matter (geosphere).

Thus, the process that moves carbon directly from the biosphere into the geosphere is the decomposition of plants on the forest floor.
The decomposition of plants on the forest floor moves carbon directly from the biosphere into the geosphere.

Which process involves carbon moving directly from the biosphere into the geosphere? (1 point) the photosynthesis of a plant the decomposition of plants on the forest floor the weathering of rocks by a river the eruption of a volcano

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