The town of Manaus recently built an artificial body of water, this reservoir will store drinking water for the
town. Which of the following could cause contamination of the water and lead to human health problems of
the townspeople?
A. Development of a water quality plan
B. Building a fence around the reservoir
C. Improvements to a water treatment facility
D. Increased use of fertilizer to keep vegetation growing

C.  She should observe female sea turtles making nests in their natural habitats.

Explanation:

A scientific investigation is a scientific inquiry which deals with answering the queries of the natural process, phenomena or events. The answers are supported by direct observation and detail and valid experimentation procedures. The outcomes are valid and acceptable.

C. is the correct option this is because of the fact that it involves the direct observation of sea turtles making nests. This will be valid outcome of the scientific investigation.