Choose your answer from: 1. friendship; 2. science; 3. motion; 4. charge; 5. pain; 6. Energy; 7. feelings; 8. damage;

Fact 1: Some touch receptors sense differences in temperature or pain. Fact 2: Touch receptors are a type of mechanoreceptor. Given the two facts above, what can some mechanoreceptors sense?
Answer:
5.