Answer:
A reservoir constitutes the water found in the different stages of the cycle. The most reservoir is the oceans, which have 97% of the Earth's water.
Step-by-step explanation:
Groundwater reserves that are located in surface areas can be classified as fossil. For example, in the Sahara and the Arabian Peninsula there is a huge reservoir of groundwater. This water continues to move under pressure and is one of the sources that oases feed on. This water adds its discharge to the ocean, thereby increasing the ocean reservoir.