A fertile or green area in an arid region
A.
B.
C.
D.
Answer & Solution
Solution:
Oasis is a
fertile area in a desert or arid region, often containing water.
Barren (A)
refers to land that is unable to support plant life, opposite of an oasis.
Dune (C) is
a mound or ridge of sand, not fertile land.
Flora (D) refers to plant life in general, not specific to an
arid region.

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