The correct answer is C. because oases provide a source of water. The passage states that oases are centered around water sources such as natural springs and underground wells, which is essential for sustaining life in the desert.
An oasis in the Sahara can vary in size from about 2.5 acres for a tiny village to larger farm lands. At its center is water, often in the form of natural springs, underground wells or entire irrigation systems. About 75 percent of the Sahara's population live in oases, which make up only about 800 square miles of the desert. The date palm is most characteristic of the vegetation that grows there. Other typical food sources grown in Saharan oases include figs, peaches, citrus fruits, wheat and barley.
—adapted from the Public Broadcasting System
According to the passage, why do most of the people of the Sahara live in oases?
A.
because people are moving off of farms
B.
because the oases are a safe place to live
C.
because oases provide a source of water
D.
because the cities are too polluted
1 answer