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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the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.