A round character is a character we know mostly about, so an example of a scenario would be:
There was once a young girl named Sally, she is very tall, with brown eyes and dark black hair. She loves chocolates but hates sushi. But the one thing she loves the most is her sister Chey
Answer:
a person who has great responsibilities, such as a king, is constantly worried and therefore doesn't sleep soundly
The answer is probably a noun clause, like the person said above, but none of the words are bolded