Question

engineers are designing a solution to an erosion problem on a local hill. explanation: the hill used to be home to many small animals and plants until people built a road on the hilltop. whenever it rained, water flowed off the road and down the hill. this caused erosion, which destroyed the native habitat. problem: the amount of water that flows over the hillside must be reduced so that the habitat can be restored. solution: design and build a drainage - tube system to direct water from the road away from the hillside. which of the criteria that represent a responsible, effective solution to the problem. a. the tube will send the water into a storm water sewer. b. the tube will allow water to spread across the surface of the hill. c. the water will be directed to the top of the hill so it can evaporate. d. less water will flow down the hill after the tube is installed than before.

Explanation:

The goal is to reduce water flowing over the hillside to restore the habitat. Option A sends water to a storm - water sewer, which removes it from the hillside area. Option D indicates a decrease in water flowing down the hill after tube installation, which directly meets the requirement of reducing water flow over the hillside. Option B would increase water spread on the hill, worsening the erosion problem. Option C directing water to the top of the hill is not a practical or effective way to reduce water flow over the hillside for erosion control.

Answer:

A. The tube will send the water into a storm water sewer.
D. Less water will flow down the hill after the tube is installed than before.