Final answer:
The Principle of Design that involves connecting separate parts of an artwork via consistent use of an Element of Art is known as Unity.
Step-by-step explanation:
Connecting otherwise separate parts in an artwork by using the same Element of Art throughout is referred to as the Principle of Design called Unity. Unity in art conveys a sense of completeness and cohesiveness, making the work feel whole. For example, an artist might use a recurring shape or color throughout their work to tie different parts together and create a harmonious overall effect. This sense of unity can be visually and conceptually satisfying, creating pleasure when viewing the art as it makes all the varied parts fit into a coherent whole.