Answer:
Hydrosphere provides or makes water available for the biosphere.
Step-by-step explanation:
Hydro means water while sphere is cycle, hence hydrosphere simply put is water cycle.
Bio means life, then biosphere simply put is life cycle.
The main interaction between hydrosphere and biosphere is that hydrosphere provides water for the biosphere to function and grow with.
The interaction between them is what makes food available for human and animal.