A3-hectare lake in the american midwest suddenly has succumbed to an algal bloom. what is the likely cause of eutrophication in this lake?
(a) nutritional runoff
(b) accidental introduction of prolitic culture of algae
(c) increased solar radiation
(d) introduction of non-native tertiary consumer fish
(e) iron dust blowing into the lake

(A) nutritional runoff

Explanation:

According to my research on algal bloom, I can say that based on the information provided within the question this was probably caused by nutritional runoff. This term is defined as the process in which too many nutrients are introduced to a certain body of water causing it to act like a fertilizer which in term causes an excessive growth of algae.

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