Proper usage of apparatus in competition means it should be:

The correct response emphasizes the importance of utilizing apparatus in a manner consistent with its designed function. This principle is crucial in ensuring both safety and effectiveness during competition. Proper usage means that the equipment should only be used for the activities or skills for which it was specifically created. Adhering to this allows athletes to perform optimally and minimizes the risk of injury or accidents that can arise from using equipment improperly or for unintended purposes.

Understanding the intended purpose of apparatus is essential not just for maintaining safety but also for ensuring that athletes can develop their skills effectively. When athletes use the equipment as intended, they can better gauge their progress and enhance their training in a secure environment.

The other options, while they may seem relevant, do not capture the essence of proper usage in the context of competition. For example, using apparatus for any purpose can lead to misuse and potentially dangerous situations. Saying the equipment should be adequate for all skill levels does not address the necessity of using the equipment correctly as per its specifications. Lastly, while accessibility is important, it does not relate directly to how the apparatus should be used in terms of safety and best practices.