Keratinized skin cells are found in the hair primarily but also on the palmar skin of the hands.
Homeostasis is the maintaining of a stable and healthy environment in any organism. Any disease is fundamentally a disruption of this stability, causing some kind of disorder in the organism's inner functions.
Number three I'm 95% sure.
Something that could cause someone to use social media may be the excitement of being in contact with different people around the world, or seeing funny memes, or videos, but cyber bullying can cause many to become depressed, people can be ruthless and bully one for their appearance, race, sexual orientation, religion, financial state, clothes, disabilities, etc.
Joes way of hanging out with the wrong people can be a big factor of the problem with his substance addiction
