Answer: A. grows from being challenged.
Step-by-step explanation:
A simile is a figure of speech that is used when we want to compare one thing with another thing. Comparison is done using "like" or "as .... as".
The poet uses a simile in lines 5 and 6 to reveal that the speaker grows from being challenged. This can be seen in the text as the author says that the challenges faced gave him strength