The use of the word "hero" was meant to present the author's opinion that Brown should be admired for his inspiring actions, as shown in the last answer option.
When Emerson states that there is a person whom he considers a hero, he shows how he admires that person and is inspired by the good deeds he or she has taken.
More information about Emerson at the link:
https://brainly.com/question/25686864