What safety feature prevents elevator doors from closing on passengers?

The safety feature that prevents elevator doors from closing on passengers is the safety sensors or door jambs. These sensors are designed to detect any obstruction in the doorway, ensuring that the doors do not close when a person or object is in the path. When the sensors detect an obstruction, they trigger a response that either stops the doors from closing or reverses their motion, allowing safe passage for individuals entering or exiting the elevator. This functionality is a critical component of elevator safety systems, prioritizing the protection of passengers during the operation of the elevator doors.

While other options, such as emergency stop buttons and weight sensors, contribute to overall elevator safety, they are not specifically designed to prevent door closure on individuals. The manual override system is primarily a mechanism for emergency situations, rather than a safety feature that actively prevents door closing during normal operation.