The 2-d area that is enclosed by a line which establishes contour is known as a shape.
A shape has two main dimensions which are the length and the width. It should be noted that the elements of art such as the texture, line, color etc give the shape the boundaries that it has.
An example of a shape include rectangle, square, triangle, circle etc. It should be noted that a shape like a square is made up of four lines which are joined together.
In conclusion, the correct option is shape.
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