Question

think about a small stream of water flowing slowly on the ground. the moving water has just enough force to push along some small rocks. as the water moves, it pushes along more and more of these small rocks. the rocks begin to spin and turn in the moving water. over time, the moving rocks slowly dig into the ground below the water, making a canal. based on this selection, what is needed for a canal to form? a people building dams b sand settling on the ocean floor. c rocks moving in water d light rain for a day or two

Explanation:

The text describes how moving rocks in water slowly dig into the ground to form a canal. People building dams is not related to the natural - formation process described. Sand settling on the ocean floor has no connection to canal formation on land. Light rain for a day or two is not the key factor as described in the text. The key factor is rocks moving in water.

Answer:

C. rocks moving in water