Final answer:
The pattern in music is known as Musical Form, which defines the structure of the piece and is essential to its unique character and emotional journey.
Step-by-step explanation:
The pattern a piece of music follows is known as C) Musical Form. Musical form is the structure or architecture of a piece of music. It's how the piece is divided into sections, and how themes, melodies, and harmonies are repeated and developed over time. Rhythm and repetition create a sense of movement within the music, often leading the listener through various emotional states. Theory and notation are important aspects of learning music and understanding musical form is part of that theoretical knowledge. The pattern is what gives a piece of music its distinct character, distinguishing it in style from pieces with different patterns or forms.