Question

nociceptors detect:
sound waves.
chemical signals in food.
pain and temperature changes.
light stimuli.

Explanation:

Nociceptors are sensory receptors specialized to detect harmful stimuli that cause pain, along with extreme temperature changes that can damage tissue. Sound waves are detected by auditory receptors, chemical signals in food by taste receptors, and light stimuli by visual receptors.

Answer:

Pain and temperature changes.