Which definition describes a "Neighboring tone"?

A neighboring tone, also known as a "auxiliary note," is indeed defined as a non-chord tone that is approached by step from a chord tone and then resolved back to that same chord tone by step. This means that it typically occurs between two occurrences of the same pitch; it creates a brief embellishment. The movement to the neighboring tone adds rhythmic and melodic interest, but it does not alter the underlying harmony since it is a non-chord tone.

This definition helps musicians understand how neighboring tones can enhance melodies by creating motion while maintaining a connection to the chord structure. In this context of musical terminology, other choices do not accurately describe the function or characteristics of a neighboring tone. This question reinforces the importance of distinguishing between various types of non-chord tones and their specific roles in music theory.