Final answer:
The amount of time Chris holds the first note on the G string of the guitar is called the duration.
Step-by-step explanation:
The amount of time Chris holds the first note on the G string of the guitar is called the duration. Duration refers to the length of time that a note is played or held. In music notation, duration is indicated by different types of note symbols, such as whole notes, half notes, quarter notes, and so on. The duration of a note determines its rhythmic value.