Answer:
I'm not sure if you need to fill in the blank, but if you do it's contrast. To create emphasis using contrast, an artist might use different shades of gray in a black and white drawing.
Symmetrical balance describes a composition with Balanced Nature. A sense of Order, and Clarity, as well as Consistency.
Answer:
<h3>4.Factors that Affect Compositional Balance</h3><h2>i.Size . Size is probably the most obvious factor of all. ...</h2><h3>ii.Color. Warm colors move forward and usually weigh more than cooler colors, whereas cool colors typically recede into the background. ...</h3><h3>iii.Position. ...</h3><h3>iv.Texture. ...</h3>
It depends on the exact field you're referring to (you categorized this under Arts, which is a bit confusing), but one answer could be resonance.