How come people feel pain?

Hope this helps!

Explanation:

"When your body is injured in some way or something else is wrong, your nerves (cells that help your body send and receive information) send millions of messages to your brain about what's going on. Your brain then makes you feel pain." -Why Do I Have Pain? (for Kids) - Nemours KidsHealth

I didn't write that, but I gave credit to whoever did.

answer; i believe the correct answer is (replication is not conservative);