Based on dante the character's actions, what did dante the poet most likely consider heroic?

The fact that he was able to travel through Hell despite his fears and follows his guide Virgil as he travels there shows his heroic side.  There many levels of Hell and all of them were frightening to behold.  It would take a lot of courage to keep going and he does that.

taking into account that a theme is the central topic a text treats and can be developed through a story, play, poem etc. the following are themes that can be further developed:  

my best friend jeffrey has many unusual interests. (the story could be about each of the unususal interests)

once a man gives his soul over to evil, he can never go back. (this could be a saying or a proverb)

the three sheepdogs lay around the yard all day. (it could be developed detailing how each of these sheepdogs lay around)

a priest's collar has an unusual effect upon people. (it could be developed detailing the different effect upon people)

innocence is a powerful force in a world full of corruption. (it could be developed detailing how is a world full of corruption)

king lear is a play shakespeare wrote later. (it is just a sentence and doesnt give any idea or topic to be discussed in details.

evil often wears the disguise of innocence. (this could be a saying or a proverb)

that is the way of a cheater and cheaters get nothing but bad grades and in trouble.