Answer: C.) Images of rivers and fogs that behave in an unnatural way create an agitated mood.
In this passage, Titania is describing the consequences of the fact that the fairies have been unable to meet and dance anywhere. She describes the winds blowing, the fog rising from the sea, and the rivers overflowing. These are all consequences of this fact, and a sign of revenge from nature. The descriptions of rivers and fogs behaving in unnatural ways contribute to the creation of an agitated mood.