What can affect the effectiveness of surveillance systems?

The effectiveness of surveillance systems is significantly impacted by environmental conditions, such as poor lighting and camera obstructions. When the visibility is compromised due to inadequate lighting, cameras cannot capture clear images, which can lead to missed incidents or misidentifications. Similarly, if there are physical obstructions such as foliage, walls, or furniture, these can block the camera's view of key areas, rendering parts of the monitored environment invisible to the surveillance system. Therefore, ensuring optimal conditions—such as proper lighting and an unobstructed view—is crucial for the functionality and reliability of surveillance systems, making this option the most relevant in assessing their effectiveness.