Some snakes have special sensory organs that detect the infrared region of the electromagnetic spectrum. Compared with human vision, these snakes can sense electromagnetic waves that have

Infrared waves have lower frequency and longer wavelength than visible light, which humans see. Frequency and wavelength are inversely related: as frequency decreases, wavelength increases. Therefore, the snakes can sense waves with a lower frequency and a longer wavelength, choice C.

AI-written and checked against the verified answer.