Final answer:
The back seat is recommended as the safest place for children under 13 years of age to be properly secured.
Step-by-step explanation:
The back seat is the safest place for all children under 13 years of age. This safety recommendation is based on the fact that the front airbags can be dangerous to smaller passengers in the event of a crash. It is advised that children under the age of 13 be properly secured in a back seat in an appropriate booster or car seat, tailored to their weight and height requirements for the best possible protection.