You are presented with the quiz "What does the receptors on the epidermis detect and tell your feet or buttocks they are touching?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "pressure receptors are found mainly in the skin" and "skin pressure receptors announce that the feet are on the ground or the buttocks are on a chair". So, what's the best answer to the question?

Options:
[i] wavelengths and photons;
[ii] temperature;
[iii] heat or cold;
[iv] Pressure recpetors;
[v] light energy;
[vi] rays or beams;
[vii] refraction of light;
[viii] energy of moving objects;
Answer:
[iv]