Final answer:
The height of contour for the mesial and distal surfaces of the maxillary canine in proximal view is located at the cervical third of the crown.
Step-by-step explanation:
In the proximal view of the maxillary canine, the height of contour for the mesial (toward the midline) surface is typically located at the cervical third of the crown. This means that the widest part of the tooth, where it bulges out the most, is around one-third of the way down from the top edge of the crown. On the distal (away from the midline) surface, the height of contour is also usually located at the cervical third of the crown.