An ecosystem, and our surroundings
Explanation:
Physical education, also known as Phys Ed., PE, gym, or gym class, and in some Commonwealth countries as physical training or PT, is a class that pupils are required to take at school.
Bariatric physicians<span> may </span>treat<span> overweight and obese </span>patients<span> with diet, nutrition, exercise, behavioral therapy, appropriate medications, or any combination of these treatments</span>
A natural science is the knowledge of objects observable in nature, behavioral science is the scientific study of human or animal behaviors
That would be the pituitary gland
