After baggage is checked in, where is it placed?

The correct placement for checked baggage after it has been processed is in the airplane cargo hold. After passengers check in their bags, the airline securely transports them to a designated area where they are loaded onto the aircraft.

This process ensures that the baggage is kept secure until it can be placed in the cargo hold of the aircraft, where it is stored for the duration of the flight. This is essential for safety and security, as all baggage must be accounted for and monitored throughout its journey.

The other options do not accurately reflect the flow and process of checked baggage. The baggage claim area is where passengers retrieve their bags after arrival, while the secure holding area would typically apply to luggage that requires additional screening or holds due to security concerns. The passenger waiting area is where travelers relax before their flight and does not involve any baggage handling.