Question

which statement describes an interaction between the biosphere and the hydrosphere?
plant roots take in water through their roots.
plants take in carbon dioxide from the air.
energy stored in plants is transferred to humans and animals that eat them.
plants make food through photosynthesis and release oxygen into the atmosphere.

Explanation:

The biosphere includes all living organisms (like plants). The hydrosphere is all the water on Earth. When plant roots take in water (from the hydrosphere), it is an interaction between the biosphere (plants) and the hydrosphere (water).

• For "Plants take in carbon dioxide from the air": This is an interaction between biosphere (plants) and atmosphere (air - part of atmosphere, not hydrosphere).
• For "Energy stored in plants is transferred to humans and animals that eat them": This is an interaction within the biosphere (plants, humans, animals).
• For "Plants make food through photosynthesis and release oxygen into the atmosphere": This is an interaction between biosphere (plants) and atmosphere (oxygen released into air - part of atmosphere, not hydrosphere).

Answer:

Plant roots take in water through their roots.