Question

there has been more heavy rain in the area in recent years, and scientists are worried that it will speed up erosion and negatively impact the many villages located along the canyon’s walls.
the scientists are collecting data on the average speed of the water in the river each month.
what other kind of data should they collect to determine if the faster water is causing erosion that will be dangerous to the communities that live there?
a measure the temperature of the water each month to see if the speed of the water is related to the temperature of the water.
b measure the amount of rock particles in the river as it enters the canyon to see if the speed of the water is related to the concentration of rock particles at the river head.
c measure the water levels each month to see if the speed of water is related to the depth of the water

Explanation:

To determine if faster water causes erosion dangerous to communities, we need data related to erosion. Erosion is indicated by the amount of rock particles (sediment) carried by the river. Option A (water temperature) and C (water levels) don't directly relate to erosion. Option B measures rock particles, which shows if water speed is linked to erosion (more rock particles mean more erosion from canyon walls).

Answer:

B. Measure the amount of rock particles in the river as it enters the canyon to see if the speed of the water is related to the concentration of rock particles at the river head