multiple choice question\nwhat kind of lines establish the outside borders of a three - dimensional…

Brief Explanations:

Contour lines are used to establish the outside borders of a three - dimensional form. They define the outline or silhouette of the form, giving a sense of its shape in space. Boundary is a more general term not specific to the lines of a 3 - D form. Dynamic lines suggest movement and are not related to the outside borders of a form. Implied lines are not actual lines but are suggested by the viewer's eye and are not used to define the outside borders of a 3 - D form.

Answer:

B. contour