Which two agencies are known for rating climbing?

The correct choice highlights the two primary organizations recognized for their role in rating climbing: the Union Internationale des Associations d'Alpinisme (UIAA) and the Commission Européenne de Normalisation (CEN).

The UIAA is a global federation of national climbing associations and is responsible for developing climbing standards and safety guidelines, including the rating scale for climb difficulty. This organization has been instrumental in establishing universal guidelines that promote safety and quality in climbing activities, which are widely acknowledged and utilized by climbers around the world.

CEN, on the other hand, plays a significant role in setting European standards for various outdoor activities, including climbing equipment and practices. Their work complements the efforts of the UIAA by ensuring that the technical specifications for climbing gear and safety practices meet stringent requirements for user safety.

Together, these two organizations provide a framework that climbers can rely on for evaluating both the difficulties of climbing routes and the standards of the gear they use, which is essential for promoting safe climbing practices.