Final answer:
According to TC 545.414, it is unlawful to operate an open bed pickup truck with a child younger than ____ in the open bed.
Step-by-step explanation:
The subject of this question is Law. Specifically, it is referring to a specific legal code - TC 545.414. This code pertains to the operation of open bed pickup trucks with children in the open bed. The question asks about the age limit for operating such a vehicle with a child.