The answer is A because there is certain hours/minutes that everyone needs. To much sleep or not enough can make someone feel tired, but getting the right amount can make you feel energized. To much physical activity can lead to injury since you’re not allowing your muscles to rest.
Answer: 
Explanation: The peripheral nervous system (PNS) is the division of the nervous system containing all the nerves that lie outside of the central nervous system (CNS).
Answer:
Osseointegration.
Explanation:
Osseos are known as bone. Bone may be defined as one of the important connective tissue present in the body. Bones bears the weight of all the muscles of the body.
Osseointegration determines the structural and the functional connection between the bone and the artificial implantation of the bone. This is also known as bone adherence and the new bone get directly laid on the implant surface of the bone.
Thus, the answer is osseointegration.
The thalamus.
The thalamus relays information to other cortex’s and regions, mediating different aspects of pain.
