A student is planning a field study of a pond in which a large increase in algae populations has been observed. large numbers of dead fish have also been observed in the pond. to find out what caused the death of the fish, the student should do each of these except -

measure the amount of light at various levels in the pond

Multiple choices:

A. test for chemicals that might poison fish and cause algae to grow

B measure the dissolved oxygen content in pond-water samples

C look for sources of pollution that may be affecting the pond

D measure the amount of light at various levels in the pond

Answer;

D. measure the amount of light at various levels in the pond

Fish in the pond feeds on the algae that grows in the pod.

Therefore; death of fish in the pond caused a large increase in algae populations.

Measuring the amount of light in the pond would not tell the student what caused the death of the fish in the pond.