Answer:
D) Nails
Explanation:
Keratin that's found in our hair and nails is water proof
Answer:
I think the correct answer is A
Explanation:
Stress can be caused by the things around you and what happens in your personal life. But stress is not always caused by social and physical health. So I think it would be A because stress can have a part in your environmental health and mental health.
Hope this helps, good luck.
I think it is the third one