Choices: a). Gluons. b). Photons. c). Neutrons. d). Energy. e). heat. f). distance. g). sunlight. h). Sound waves.

Fact 1: Sight is the ability to sense light, and the eye is the organ that senses light. Fact 2: Light is made of photons . Given the two facts above, what does the organ of the eye sense?
Answer:
b).