How many firefighters are required for a rescue basket operation?

For a rescue basket operation, the requirement of six firefighters is based on ensuring adequate manpower for safety and efficiency during the rescue process. This number takes into account the various critical roles required during the operation, such as maintaining the stability of the basket, communicating effectively, managing the victim's safety, and handling the equipment used in the rescue.

Having six firefighters allows for a distributed workload among team members, providing the necessary support for lifting, securing, and lowering the rescue basket while maintaining a safe environment for both the rescuers and the individuals being rescued. The team can also coordinate better, ensuring that there is always someone available to manage equipment and oversee the safety protocols involved in the operation.

The other options suggest higher numbers of firefighters that are not typically necessary for the efficiency of such a rescue operation, as six personnel are often deemed sufficient to cover all the essential tasks without overwhelming the team or complicating the operation.