A student buries an ice cube in a pan of dirt and observes the dirt as the ice cube melts. This activity is a model of the formation of a kettle.
The Three Gorges Dam is located along the Yangtze River.
Water sources in the Middle East are limited and very polluted. These people do not have clean water, and the water they can get, they are very thankful for, although it is full of bacteria and mud.
Your answer is: B) limited.
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