Tunnel:cave::note:song what type of word relationship does this analogy show?

I believe this type of analogy would be an object and related object analogy.

Explanation:

See how a tunnel, is related to a cave, and a note is in relation to a cave.

An analogy is the comparison through which the ideas or things are compared to each other. Through Analogy, the things, which are different from each other, are compared. Metaphors and similes are used as tools to represent an analogy. Therefore, the analogy is more elaborate than simile and a metaphor.