How are people able to live in the arid regions outside of the nile valley? question options: salt is removed from seawater to create the water supply. the oases and aquifers provide water. water from the nile river is piped to other areas. the rain-shadow effect causes heavy rains.

It would be the oasis and aquifers provide water to the people. In the arid places people tend to supply by travelling around the desert and stopping in areas that has oasis and aquifers in order to replenish their water supplies. Also oasis and aquifers become stopping posts if it is a trade route for merchants and travelers in the arid regions.