When a muscle wastes away from not being used it is called . a
Contraction
b
Extension
c
Involuntary
d
Atrophy

it shoild be o

step-by-step explanation:

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !