Well first you have to know the that between hair and fur, they are merely the same thing. The hair length/type (and all that jazz) of the animal depends on the parents genetic DNA that is passed on to the offspring.
I think you forgot to add the options but based on my research, the correct answer to this question is "A relay is an electrical switch that works through electromagnetism." This statement about relays is correct. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
Answer:
Praise the puppy or give it a treat
Explanation:
You wouldn't want to punish it for doing something good
