Final answer:
Not securing a toddler in a vehicle is an example of child negligence since it's the caregiver's duty to ensure the child’s safety, which includes the proper use of car seats and seat belts.
Step-by-step explanation:
Failing to ensure a toddler passenger is secured in a vehicle is an example of: A. Child negligence. This is because it is the responsibility of the caregiver or driver to ensure the safety of child passengers. Not securing a child properly in a vehicle can lead to serious injuries or even death in the event of an accident. It is important to understand that child negligence encompasses a failure to provide the care necessary for a child's safety, which in the context of vehicle transportation pertains to the proper use of car seats and seat belts designed for children.