Answer:
The phrases which a romantic poet could use to describe a hill covered in wildflowers might be the second (a rainbow carpet) as well as the forth (the sweet scent of summer lingering on).
Explanation:
It could be said that in such phrases, the second and the forth, the author would be using a figurative speech known as a metaphor, which is used to make a comparison between two things that even though have something in common, are not alike. This means that comparison made in metaphors are indirect and they are not meant to be taken literally just like in the example provided where the author, in order to describe a hill covered in wildflowers, might compare it with a rainbow carpet, making reference to the color of the wildflowers, as well as the sweet scent of summer lingering on, making reference to the smell of such wildflowers.
