How can an infant be carried on board an aircraft?

An infant can be carried on board an aircraft either on the lap of an adult or in a properly restrained infant seat, which is why this option is correct. The Federal Aviation Administration (FAA) and most airlines have regulations that allow infants to travel in this manner for both safety and comfort during the flight. When an infant is seated on an adult's lap, the adult must typically also secure themselves with a seatbelt that extends around both them and the infant during takeoff, landing, and whenever the seatbelt sign is illuminated.

When using a properly restrained infant seat, it should be FAA-approved and installed according to the manufacturer's instructions. This offers an additional layer of safety, ensuring the infant is secured in a way that minimizes risk during turbulence and other flight conditions.

The other options are not suitable for transporting an infant on a plane. For instance, using a personal backpack or carrier would not provide the necessary safety standards required by airlines and regulators. A standard seat with only a seatbelt may not be adequate for an infant’s size and safety needs since they require specialized restraint systems to ensure their safety. Carrying an infant in a designated emergency exit row is not allowed, as regulations prohibit infants and small children from these row positions due to the responsibilities that