Read the passage below and answer the question.

here swelled the river in its boldest course, interspersed by halcyon isles on which nature had lavished all her prodigality in tree, vine, and flower, banked by noble bluffs, three hundred feet high, their sharp ridges as exquisitely definite as the edge of a shell; what type of figurative language does fuller use to describe nature in this passage?

metaphor
simile
personification
exaggeration