The ratio of individual pieces within a whole in relation to each other is   

a. symmetry.

b. scale.

c. emphasis.

d. proportion.

i got corrected it isnt scale its emphasis.

Explanation:

The ratio of individual pieces within a whole in relation to each other is  

A. symmetry.

B. scale.

C. emphasis.

D. proportion.

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."