A gusset is a triangular or square piece of fabric inserted into a seam to add breadth or reduce stress from tight-fitting clothing.
The process of design is best described with the word "creating".
During the process of design the artists make plan how to create something (painting or another art piece), take <span>activities in creating visual, auditory or performing artifact.
But the work they are doing is creating something new.
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Medium.
If there is more than one medium the piece is referred to as mixed media.