Because that’s how the character is made . What kind of question is that .
Gospel often has three part harmonies
B. , Neutral.
Primary colors are Red, Blue, and Yellow.
Secondary colors are Orange, Purple, and Green.
Complimentary colors are two colors that compliment each other. For example. yellow and purple, green and red, and lastly blue and orange.
That leaves Neutral to represent the gray scale.
Mezzo Soprano for a female voice between A3 (a below middle c) and a5 (2nd a above middle c)
That’s what I learned at least in chorus lol