Answer:
d) They work more than most others.
In the first paragraph, you could make it your thesis statement
A metaphor for courage might be describing someone as having "the heart of a lion". He does not actually have the heart of a lion, it's a metaphor to show that he is courageous.
He went to the woods because I wished to live deliberately, to front only the essential facts of life. While living in the woods, Thoreau desired to simplify his life.
hope this helps x
