Question

Oasis are -.
a ) An impression of water in desert . b) pools of water in the desert​

Answer 1

Answer:

Oasis are pools of water in a desert. Mirage are an impression of water in a desert.

Answer 2

Answer:

Rain is usually the main source of water in a desert, but it falls very rarely. Many desert dwellers rely on groundwater, stored in aquifers below the surface. Groundwater comes from rain or other precipitation, like snow or hail. It seeps into the ground, where it can remain for thousands of years.

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