Yes. Virtually anything can be the theme of an essay, as long as you can find enough information about it to write enough paragraphs to be considered an essay.
Grover tells Percy that, when the Furies found them on the bus, they were asking, "where is it?" rather than "where is he?" It seems they are looking for an object, rather than a human.
Answer:
you didnt add the excerpt but the definition of idiom is
a group of words established by usage as having a meaning not deducible from those of the individual words
or
a characteristic mode of expression in music or art.
Explanation:
The eight letter would be K. hope that helped