I don't know which autobiographical piece of art you are talking about, but generally an autobiography is about the writer himself.
So, having that in mind, I'd say that this is an autobiographical piece of art because <span>c. It shows the pain and suffering experienced by the artist. </span>
Answer:
Try doing light shading with the help of a 2B & HB pencil ✏️ & tissue paper.
Veronica Taylor..........hope this helped :)