On one hand, I aspire to an Ivy League vocation:1
professor of the sciences in higher education. 2
But like noble amphibians that thrive on land and in the stream, 3
I’ve got another world of which I like to gladly dream. 4
Some say that it’s abnormal; my affections are exclusive. 5
In science, they say, emotions are something quite elusive. 6
Line 3 exemplifies which kind of figurative language?