The Earth has spheres that are constantly interacting. Which of the following is the best example of the geosphere interacting with the biosphere?

Strong winds carry pollen across large fields to flowers.
A strain of bacteria is able to live deep in an ocean.
Volcanic ash provides nutrients in the soil for plants.
Some land mammals are dependent on ice formations.

Volcanic ash provides nutrients in the soil for plants.

The best example of the geosphere interacting with the biosphere is when volcanic ash provides nutrients in the soil for plants.