I think it's D. Sorry i wrong, im tired.
Answer:
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Answer: Guidelines used to create certain effects in art
Explanation:
The principles of design refers to the rules that are made by a designer to being about an attractive composition. It is also the guideline that are used to create certain effects in art.
It is when ideas are projected into visual content to make it attractive. The principles of design include proportion, emphasis, repetition, white space, balance and alignment, contrast etc.
