Answer:
I think oasis
because wadis is probably a small dry region in a place where there are rains pouring sometimes
We need a picture in order to answer the question.
The rich soil of Indus
Valley resulted from the floods that occurred every year in the area. The water
from the flood brought fertile soil with it. <span>
<span>The settlements of Indus Valley were built on the river bank.
The time for this civilization is around 2500 BC, and is known to have lasted
for around a thousand years leaving behind a history of great civilization.</span></span>