What is the function of the rungs on a ladder?

The function of the rungs on a ladder is primarily to allow a person to climb the ladder. Rungs serve as rest points for the climber's feet, providing the necessary elevation and support as the individual ascends or descends. The design of rungs is intentional, ensuring they are spaced appropriately to facilitate safe and effective climbing.

While stability, guidance for the fly section, and beam support are important aspects of a ladder's overall function, they do not pertain specifically to the role of the rungs. The rungs are integral for human interaction with the ladder, making climbing safe and manageable, which is why option B accurately captures their main purpose.