“The Cask of Amontillado” is set during the carnival season. How does this contribute to a central message? There is a heightened sense of excitement in the air.
There is a great deal of activity.
People lose their fear of doing things that might be wrong or inappropriate.
Many people have traveled to participate in the carnival.

It contributes to the central idea because it help understand and answers questions like why is their excitement in the air or what is the setting of the story.

Explanation:

Then again I could be wrong so if their is another answer choose that one over this one.

main idea: it is important to prepare today for the needs of tomorrow.

the grasshopper was dying due to hunger, and this was because he didn't prepare for the winter.

the ants told the grasshopper, "if you were foolish enough to sing all the summer, you must dance supperless to bed in the winter."

the ants were spending a fine winter's day drying grain collected in the summertime.