Final answer:
The metaphor used to depict the feeling of guilt in the town is the omnipresence of Santiago's death.
Step-by-step explanation:
The metaphor used to depict the feeling of guilt in the town is 2) The omnipresence of Santiago's death. This metaphor suggests that the guilt is constantly present and inescapable, just like death itself. It emphasizes that the guilt is pervasive and affects everyone in the town. The use of the word 'omnipresence' further emphasizes the all-encompassing nature of the guilt.