Final answer:
Among the options given, used tires are not considered a playground hazard when they are appropriately secured and used; other listed items are recognized as potential risks. Option 2 is correct.
Step-by-step explanation:
The option that is not a noted playground hazard among the choices given is used tires. While tripping hazards, child collisions, and sharp points or corners are all recognized risks that can lead to injuries on a playground, used tires themselves are not inherently dangerous and are often repurposed as playground equipment (provided they are properly secured and maintained). To further minimize risks, it is advisable to choose an open location with lots of space when playing with objects like basketballs to reduce the chances of tripping or collisions.