Rivers that have developed over a long period of time are found in wide valleys with flat, low-lying bottoms. these valleys were created by the removal of rock and soil through the process of
erosion
glaciation
deposition
weathering

The cross section of rectangular prism a measures 1.5 units by 1 unit. the cross section of triangular prism b has a base that measures 2 units and a height of 1.5 units. if the length of each prism is 1.81 units, which statement is true?

Ais a survey that focuses on only a small portion of the population, and the results are generalized for the larger population.

Where does the availability of water pose the greatest problem