Correct answer: Reservoir
The reservoir is a component of the biosphere that serves as a long time storage area for water or the nutrients. It stores the substances that are not recycled.
The water is warmed by the sunlight and then it evaporates, then it is colled down by the process of condensation, Then it is brought back to the earth surface in the form of rainfall. The water and the nutrient that are not recycled are stored in the reservoir for further use.