How can cameras enhance security?

Cameras enhance security primarily by providing visual surveillance of an area and deterring criminal activities. When security cameras are strategically placed in various locations, they allow for effective monitoring of activities within those areas. This surveillance capability enables security personnel to observe real-time events, identify suspicious behavior, and respond quickly to incidents as they occur.

Additionally, the mere presence of cameras acts as a deterrent to potential criminals. Knowing that they are being monitored can dissuade individuals from engaging in illegal or disruptive actions, as the risk of being recorded and later identified increases. This preventive aspect is crucial in maintaining a safe environment in both public and private settings.

The other options do not accurately reflect the primary functions and benefits of security cameras. For example, spying on conversations is not a legitimate use of security cameras and violates privacy rights. Recording only at night limits the utility of cameras, as surveillance during the day is equally important. Lastly, while restricting employee movement may be a measure taken for certain security protocols, it is not a primary function of cameras and does not relate to their surveillance capabilities.