The type of line that Casey's drawing is an example of is an outline.
The correct answer is "Outline." An outline is a type of line drawing that shows the basic shape of an object or figure without including any details or differences in color. To determine this answer, you can look at the description provided in the question and eliminate the other options based on their definitions. Contour lines are used to depict the edges and boundaries of an object, implied lines are created by positioning objects or elements in a way that suggests a line, and parallel lines are lines that run indefinitely in the same direction and never intersect.
