Electronic surveillance has _____ senses

• A. 1 sense
• B. 4 senses
• C. 2 senses
• D. 3 senses

Answer: (C)

Electronic surveillance relies on two senses: sight and hearing. Cameras provide the visual feed, showing what’s happening, while microphones capture sounds and voices. These two input channels cover the primary ways such systems monitor an area, so two senses is the best fit. While there are other sensors that can add capabilities (like motion or thermal detection), they don’t replace the basic pair of visual and audio inputs.