Because Ogres have layers, and onions have layers.
C I’m pretty sure it’s 5 because it kind of like a triangular prism
Synonyms may help people to figure out meanings by known words. If a word's meaning is unknown, atleast one of the synonyms must be a known word. So, the meaning of the unknown word can be explained by the meaning of the known synonym, as a synonym is an alternative word with the same meaning.