Final answer:
Option A is an example of a simile, comparing the softness of words to the softness of flower petals using 'as'.
Step-by-step explanation:
Option A is an example of a simile. A simile is a figure of speech that compares two unlike things using the words "like" or "as". In this example, the writer is comparing the softness of the words to the softness of flower petals, using the word "as" to make the comparison.
Learn more about similes