Select the correct answer. Which is NOT a protein fiber?
A.
Cotton
B.
Wool
C.
Leather
D.
Silk

Cotton

Explanation:

I looked each one up and this said no

earliest

neumes above text

neumes

colored lines

neumes

4-line staff

f, c, or g clef

notes on 5-line staff with clef

mensuration (longas and breves)

time signature (perfect or half circle)

most recent

notes on 5-line staff

modern clefs

modern note values (whole, half, quarter, and so on)

modern time signature

italian words and abbreviations for dynamics and tempo

staccato, slurs, and so on

soft,hard and rough for soft would be a pillow or a stuffed animal hard wood floor or a table rough paint