Answer: The catacombs are human-made subterranean passageways for religious practice. Many of the walls are aligned with human remains to the ceiling, and there is a small depression in the back wall. Overall, catacombs are dark, extensive, damp, and filled with piles of human bones.
For one..
Idiom means; a group of words established by usage as having a meaning not deducible from those of the individual words.
For two; what are the answer choices?
For three; I will answer it when I get more detail.
-Promise.-
Some words are: profanity, slang, trite, and vulgarity