Pollution Index of Elk Lake Algae

Question

Type of Algae
Pollution Index

(1 to 5)

Euglena 5
Oscillatoria 5
Scenedesmus 4
Chlorella 3

Question
One measure of the pollution level in freshwater is the algae pollution index. Values range from 1 (algae that live only in clean water) to 5 (algae that live in polluted water).



What is the ,begin emphasis,best,end emphasis, conclusion about the condition of Elk Lake?

Answer options with 4 options
A.
Elk Lake has a small amount of pollution because Chlorella algae can live in it.

B.
Elk Lake is polluted by the fertilizer runoff from nearby farms and golf courses.

C.
Elk Lake is a mature ecosystem because it has a high diversity of algae species.

D.
Elk Lake is polluted because it contains species of algae that live in polluted water.

Answer 1

D. Elk Lake is polluted because it contains species of algae that live in polluted water.