Which of the following is a key safety feature found on Explorer Rides?

A key safety feature found on Explorer Rides is the implementation of safety harnesses and restraint systems. These features are crucial for ensuring that passengers remain securely seated during the ride, which helps prevent falls or injuries that can occur from sudden movements or changes in speed. Safety harnesses are designed to fit snugly and protect passengers by keeping them securely in place throughout the ride experience.

While other options like emergency stop buttons, cameras for monitoring passengers, and automatic speed control also contribute to safety, they are not as directly related to passenger containment and safety during the ride itself. Emergency stop buttons allow operators to quickly halt the ride in emergencies, but they do not actively protect passengers during normal operation. Cameras monitor the safety and behavior of passengers or the ride environment, serving more of an observational role rather than a direct protective function. Automatic speed control helps maintain a consistent speed, but it does not address the fundamental need for secure passenger restraint.

Therefore, safety harnesses and restraint systems are the most essential features designed specifically to protect and secure passengers during the experience on Explorer Rides.