how is the water cycle related to the carbon oxygen cycle

The water cycle uses plants for uptake of water and transpiration from the surface, so that water can be sent to the atmosphere.  

Carbon cycle uses plants for uptake of CO2, by which it is removed from the atmosphere (and sent back to atmosphere when the plant is dead).

Explanation:

Both the cycles use plants as an integral component.  Both the water cycle and carbon cycle use subsurface for long term storage.  The water forms groundwater and can be stored for long duration.  Similarly, carbon is stored in rocks for long term.

i think the answer is b.

b. to discover aspects of the natural world.

hopefully i .