The author mentions how expensive it is to catch unshelled fish
Explanation:
In the passage, it was stated that fishermen generally move to usual locations of unshelled fish and they had to rent and pay for different amenities in order to catch the fish, Unlike the shelled fish that are relatively slow, the unshelled fish are not. They are usually active and lively in nature and this makes them difficult and expensive to catch.
D) Couplet is the structural element of the poem that contains the following two lines: If this be error and upon me proved, <span>I never writ, nor no man ever loved. </span>