Question

_________ refers to the size of one part of a form in relation to another of that same form within a work of art.

scale

proportion

size

variable size

Explanation:

Scale refers to the size of an object relative to a standard reference, size is the absolute measurement, and variable size is not a formal art term for this concept. Proportion specifically describes the comparative size relationship between parts of the same form in an artwork.

Answer:

B. Proportion