An ellipse is the result of?

An ellipse is formed when a cone is intersected by a plane at an angle, which is similar to the effect of viewing a circular shape from an angle, or obliquely. When a circle is viewed straight on, it appears as a true circle, but as the angle of observation changes, the circle begins to appear flattened along the axis perpendicular to the line of sight. This results in the shape of an ellipse, where the major and minor axes represent the longest and shortest diameter of the figure, respectively.

The other options do not accurately describe how an ellipse is formed. Scribing an arc with a compass typically results in a segment of a circle, not an ellipse. Using a protractor to scribe an arc, or scribing a complete 360-degree arc, refers to circular shapes as well. Thus, the accurate representation of the elliptical shape comes specifically from the oblique view of a circle.