Final answer:
Ben is helping to build a rectangular track according to the drawing.
Step-by-step explanation:
The type of track that Ben is helping to build, according to the drawing, is a rectangular track.
In the given information, there is no specific mention of a track being circular, elliptical, or irregular-shaped. Therefore, based on the drawing, we can determine that the track appears to be rectangular in shape.
It is important to note that the drawing and the provided information do not provide detailed measurements or specifications of the track, so the exact dimensions cannot be determined.