The fish in the lake at the local park are dying,so a professor from the local college comes to investigate.First,she measures the dissolved oxygen because she wants to check for the______________ .
A)possibility of eutrophication
B)presence of bacteria
C)influence of acid precipitation
D)presence of heavy metals

Question

Quizplus · Accepted Answer

Dissolved oxygen levels are an important indicator of eutrophication, which is the process by which excessive nutrients in the water cause an overgrowth of algae and other aquatic plants. As these plants die and decompose, they consume oxygen, leading to lower dissolved oxygen levels and eventually the death of fish and other aquatic organisms. Checking dissolved oxygen levels is a common method for assessing the health of aquatic ecosystems and identifying potential causes of fish kills. Bacteria, acid precipitation, and heavy metals can all be factors in fish kills, but they do not directly relate to dissolved oxygen levels.

The Fish in the Lake at the Local Park Are