With whom does Narcissus finally fall in love?

Answer Narcissus never believed anyone was as pretty as him. However, he did fall in love with a water nymph, who he thought was the the daughter of the river god.:

Explanation:

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).