Final answer:
Crosslinked actin assemblies may cause loss of steering ability in some PWCs.
Step-by-step explanation:
The loss of steering ability in some Personal Watercrafts (PWCs) can be caused by the phenomenon of crosslinked actin assemblies. Actin is a protein found in cells and is responsible for various cellular activities, including cell motility. In the case of PWCs, the crosslinked actin assemblies can affect the ability of the cells to pull on their environment and on each other, leading to a loss of steering ability.