Answer:
At that point, Danae was childless, and to keep the prophecy from coming true, Acrisius locked her in a tower. However, Zeus had seen Danae and had grown fond of her; so, during the night, he appeared to her in the form of golden rain and impregnated her. She gave birth to a baby, which she named Perseus.
Explanation:
Turbidity. As your book/question states it is a measurement of cloudiness in water.
