The correct answer in this case is B. Harmonic.
The remaining answers refer to other parts of a musical composition, and some such as the pitch can even be found in the study of human voice.
Answer: I looked it up and it says something about the waves traveling in a solid but I don’t know if that’s correct.
Answer:
D. Histogram.
Explanation:
A histogram with equal intervals is suitable here.
A heliocentric system is a sun-centered
