There are six levels of structural organization of a human body. Of these, the chemical level is the lowest in the hierarchy which includes atoms and molecules that are essential in maintaining life.
Atom is the smallest part of elements such as carbon, hydrogen, oxygen, nitrogen, calcium, potassium and sodium. Molecules are the chemical combination of two or more atoms.
The correct answer is early detection. It is because in order to prevent or develop certain diseases, the person should have an early detection or diagnosis in means of finding a cure or solution to the disease that one experience.
