What is an important characteristic of effective surveillance techniques?

An important characteristic of effective surveillance techniques is being observant and alert to changes in the environment. This ability allows security personnel to identify unusual behaviors or activities that may indicate a security breach or potential threat. Being observant means paying close attention to details and recognizing normal patterns so that deviations can be quickly noticed. Alertness to changes enables security guards to respond promptly and appropriately to any suspicious activity or potential hazards. This vigilance is crucial in maintaining safety and security in any environment, as it can prevent incidents before they escalate.

The other choices do not encapsulate the essence of effective surveillance. Relying solely on technology for monitoring might lead to blind spots, as human observation is essential for recognizing subtleties that technology might miss. A casual attitude could hinder the effectiveness of surveillance, as it may lead to missed opportunities to detect suspicious behavior. Lastly, while changing locations can be beneficial in certain contexts, it does not directly correlate to the fundamental trait of being observant and alert, which is vital for effective surveillance.