Answer :

An oasis is an isolated area with vegetation, which is surrounded by a place unwelcoming for live, such as desert. The most important part of oasis is a water source. Oases are very important for trade in Sahara, as they allowed the travelers to refresh.
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Answer:

An Oasis is a small fertile region in a desert that has a source of water, generally from a spring or well.

Explanation:

We talked about it in class last week

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