The document discusses different scenarios for using belay anchors while climbing mountains. It describes four scenarios involving climbs up Mount Rainier, including an ice chute with a beginner climber, a long hard snow slope with a risky runout, crossing a crevasse, and descending a steep couloir. The scenarios provide details on route, conditions, altitude, slope angles, team experience levels, and hazards to consider when determining if and how to set belay anchors for safety.