How does the concept vocabulary sharpen the readers understanding of mathilde character

What is the meaning of the word "caches" as it is used in paragraph 6

You've arrived at the cafeteria! there is a trap door in the pantry which has been covered up by an atlas. choose the square which shows greenland to open the door.

1. fallacy of logos "my favorite teacher said that we should vote for mr. martinez, so i believe he is the best." 2. fallacy of ethos "if we don't pass this environmental protection bill now, the world will probably end soon." 3. fallacy of pathos "the last time it rained, our local sports team won. it is raining today, so they will win tonight."