What must be ensured about the playing surface in sports facilities?

The correct answer highlights the importance of maintaining a safe and suitable playing environment. Ensuring that the playing surface is clear of rubbish and in reasonable condition is crucial for several reasons. A clean and well-maintained surface minimizes the risk of injuries caused by debris or hazards that could lead to slips, trips, or falls. It also ensures that players can perform at their best without having to navigate obstacles that could interfere with their movements or gameplay. Additionally, proper maintenance of the surface contributes to its longevity and usability, providing a consistent experience for athletes.

While aspects such as competitiveness, aesthetics, or challenge level may enhance the experience of playing sports, they do not prioritize the fundamental requirement of player safety and performance which is directly addressed by keeping the surface clear and well-maintained. Thus, the focus on cleanliness and condition is paramount in sports facilities.