Answer:
B. interval
Explanation:
B is most likely the correct answer, since the others don't make sense:
A: Octave
Octaves consist of the interval of 8 notes. Like from C ~ C (8 notes), D ~ D (8 notes) etc.
C: Tacet
This doesn't support the meaning of "distance from one letter note to the next instance of the same letter note".
D: Leger Line
Leger line is a line that is consistently added during music writing. Usually, the bass/treble clef consists of 5 lines (four spaces). If music writers wanted additional space to write higher notes, they would add leger lines. This concludes that this option is not correct.
After eliminating the 3 options, we are left with B. Interval.
Therefore, the correct answer is INTERVAL.
Hope this helps! Feel free to comment with corrections/suggestions to improve this explanation. Thx! Have the most exciting day!
