Final answer:
The correct answer is Decomposition. Macabre ideas include themes of darkness, horror, and death, but decomposition is not typically considered macabre.
Step-by-step explanation:
The correct answer is Decomposition.
Macabre ideas generally involve themes of darkness, horror, and death. Sorrow, doubt, and coming back from the dead are all examples of macabre ideas. However, decomposition is not typically considered a macabre idea, as it refers to the natural process of breaking down organic matter after death. While decomposition can be associated with death, it does not carry the same ominous connotations as the other options.