Found at the lowest point of a large drainage area, these seasonal, marsh-like ponds collect and store water from rain and runoff. Unlike vernal pools, playas generally fill when temperatures are unsuitable for plant growth, and often the water is salty, alkali or both.
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Answer:
They maintained good farmland by managing the rivers.
Explanation:
because I just took the test hope this helps
The coolest layer is the crust. The crust is on the surface of the earth (where we are) . Inner Core
Canal irrigation is when people use canals to transport water to places that need to be supplied with water.
