Question

a class of students is investigating the health of a local river. which two measurements would provide the most useful data for assessing the impact of nearby agricultural runoff on the rivers aquatic biome?
a. water temperature and atmospheric pressure
b. ph and dissolved oxygen levels
c. water clarity and air humidity
d. wind speed and river flow rate

Explanation:

Agricultural runoff can introduce pollutants like nutrients, pesticides, and sediment into water bodies. pH measures the acidity - alkalinity which can be affected by runoff. Dissolved oxygen levels are crucial for aquatic life and can be impacted by the presence of organic matter and other substances from runoff. These two measurements can give insights into the impact on the river's aquatic biome.

Answer:

B. pH and dissolved oxygen levels