Carbon makes four electrons available to form covalent chemical bonds, allowing carbon atoms to form multiple stable bonds with other small atoms, including hydrogen, oxygen, and nitrogen. This allows carbon atoms to form a tremendous variety of very large and complex molecules.
        
             
        
        
        
Oxygen, nitrogen, carbon, hydrogen NOT magnesium
        
             
        
        
        
Well one is the ways that humans use soil affect the soil quality
        
             
        
        
        
Answer: 1 is Health is a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity.”
2 is   There are basically six components of health history,
Physical health. ...
Social health. ...
Environmental health. ...
Emotional health. ...
Spiritual health. ...
Intellectual/mental health.
3 is no that person is in good physical health but there eviromental health isn’t good.
4 is a change in a living body (as of a person or plant) that prevents it from functioning normally : sickness.
Explanation: