Unity and Variety create:Group of answer choicesRhythmProportionHarmonyNone of the above

Unity and Variety create Harmony.

Here's the step by step explanation:

1. Unity: This is a principle of design that implies a good relationship between the different elements and principles used in a design. It gives a sense of oneness to a visual image.

2. Variety: This is a principle of design that refers to a way of combining visual elements to produce a sense of diversity. It's used to engage the viewer and guide the viewer's eye through and around the work of art.

3. Harmony: This is a principle of design that creates unity by stressing the similarities of separate but related parts. When Unity and Variety are effectively combined in a composition, they create a sense of harmony.

So, the correct answer is Harmony.