In hotel security, which of the following is a proactive measure?

Installing surveillance systems is a proactive measure in hotel security because it involves taking preventive action to protect the property, guests, and staff from potential security threats. Surveillance systems help to deter criminal activity and provide a means to monitor and record events that occur on the premises. This not only enhances safety but also increases the hotel's ability to respond to incidents effectively if they occur.

In contrast, conducting guest surveys primarily gathers feedback for service improvement rather than addressing security concerns directly. Offering room upgrades or providing complimentary services are customer-oriented strategies that enhance the guest experience but do not directly contribute to preventive security measures. These options do not inherently reduce risks or enhance the safety of the hotel environment.