Correct option is C
The correct answer is (c) Oasis
Explanation:
· An oasis is a fertile area in a desert or semi-desert environment where a source of fresh water allows plant life to thrive.
· The water in an oasis often comes from a natural spring or underground aquifer that is close to the surface.
· These areas provide a crucial habitat for animals and historically served as vital resting points for desert travelers.
Information Booster:
· Oases can vary greatly in size, from small areas around a single spring to vast regions like the Nile River valley and delta in Egypt, which is sometimes referred to as a large oasis.
· The presence of water can lead to a diverse ecosystem, with vegetation such as date palms and crops like fruits and grains being grown.
· Oases often form where subterranean water is trapped by impermeable rock layers or emerges at the surface through geological features.
Additional Knowledge: (a) Playa
· A playa is a flat, dry lakebed found in desert basins.
· It is an area where water temporarily collects after rainfall but then quickly evaporates, leaving behind a flat surface of clay, silt, and often salt deposits.
· Playas are generally devoid of vegetation due to the high salinity and dry conditions.
(b) Delta
· A delta is a landform created at the mouth of a river, where sediment is deposited as the river enters a slower-moving body of water, such as an ocean or lake.
· While deltas can be found near deserts (like the Nile Delta), the term does not describe a small, isolated area with water and plants in the middle of a desert.
(d) Mirage
· A mirage is an optical illusion caused by the refraction of light through layers of air with different temperatures.
· In deserts, it can cause distant objects or the sky to appear as if they are a pool of water, but it is not a real body of water.
· A mirage disappears as one approaches it, unlike a real oasis.