For Symbolism"3 legged stool."= Society is falling apart. For imagery"Grass was richly green." Jacksons tone was quite neutral just like the peoples expression.
"Black wooden box"=Darkness for symbolism. "A sudden hush fell upon them" As you can see their faces have changed. Is used for Figurative Language. "Humans became callous." One moment they were nice to eachother but all of a suddeen they change.
"Mr. Graves."= graveyard for symbolism. "billy, his face red and feet overlarge." For Imagery. Theme of the story is Life kepps going tradition does not make a differece.