Which of the following would be an example of something that could be detected by a skin sense? a. an out-of-tune singer b. the color of a stop light c. a hot stove d. a discoloration on a friend’s skin

The answer here would be C. This is because the out-of-tune singer would be perceived by your sense of hearing, the colour of a stop light is perceived by sight, and a discolouration on your friend's skin is also perceived by sight. However, your skin has nerves which tell you if something is harming your body. Touching a hot stovetop would harm your skin and you would move your hand.

The answer is c

Your answer is  d.)relationship between pressure and air volume and led to the understanding of how respiration works

Olfactory epithelium i believe