Final answer:
Infants should be secured in the back seat of a vehicle, facing the rear, where they receive better protection in the event of a collision and are away from airbag deployment risks.
Step-by-step explanation:
Infants should be secured in a vehicle in the back seat, facing the rear. This position is recommended for the safety and security of infants because it provides the best protection in the event of a collision. In contrast to the front seat, which poses risks such as airbag deployment, the back seat is generally safer. Additionally, infants should face the rear as it supports the head, neck, and spine more effectively in case of sudden stops or impacts. It is crucial to ensure that the child safety seat is properly installed and that it meets all safety standards for best protection.