Which type of vine structure includes both head spur and head cane?

The type of vine structure that includes both head spur and head cane is best represented by definite heads. In viticulture, a definite head structure is characterized by a defined trunk that branches out into a fixed number of canes and spurs. This setup allows for a combination of both head spurs, which are short, fruiting canes retained close to the trunk, and head canes, which can grow longer and are typically trained to spread out into the vineyard's trellis system.

This structure is beneficial as it promotes efficient light exposure and airflow around the fruiting zones, leading to improved fruit quality and yield. By integrating both spurs and canes, growers can manage vine vigor and fruit production more effectively, tailoring the structure to specific varietal needs and environmental conditions.

The other options focus on different training methods and structures without the dual aspect of both head spur and head cane together, which specifically defines definite heads.