Linked from
The 10 pages that link to Slab pull, each with the reason it gives.
SubductionBroader topic: The dominant driving force of plate motion, generated by subduction itself.
Subduction zoneRelated: The sinking slab helps drive plate motion toward the trench.
Tectonic plateRelated: It is often considered a major driver of plate motion.
Juan de Fuca PlateRelated: The descending portion contributes to forces that drive plate motion.