Question

which interval is crucial in forming the circle of fifths?
a. perfect fourth
b. major third
c. perfect fifth
d. major second

Explanation:

The Circle of Fifths is built using the perfect fifth interval. Each step around the circle is a perfect fifth up or down. For example, starting from C, a perfect fifth up is G, then a perfect fifth up from G is D, and so on. This interval creates the structure of the Circle of Fifths.

Answer:

C. Perfect fifth