Final answer:
Fencing is the most useful security measure at the perimeter of a property. Surveillance cameras, intrusion detection systems, and security lighting have their own advantages but can't match the effectiveness of fencing.
Step-by-step explanation:
The most useful security measure at the perimeter of a property is fencing. Fencing provides a physical barrier that prevents unauthorized access, thereby enhancing security. It can deter intruders and restrict their movement, protecting the property and its occupants.
While each security measure mentioned (surveillance cameras, intrusion detection systems, and security lighting) has its own advantages, none of them can match the effectiveness of a strong and well-designed fence.
For example, surveillance cameras can help in gathering evidence and identifying suspects, but they may not prevent someone from gaining access to the property. Similarly, intrusion detection systems can alert the owner or security personnel about a potential threat, but they cannot physically stop an intruder. Security lighting can improve visibility, but it may not necessarily deter criminals.