Nails are made of iron because, iron is strong and sturdy; although nail rust when it undergoes oxidation when expose to water but it is not explosive. 
Barium and phosphorus are not suitable for nail making because of their properties.
Barium is an element which reacts with virtually all non metals, forming poisonous products which are dangerous to health and to the environment. It also reacts explosively with water.
Phosphorus is not found in its pure form in nature, it conducts electricity and it is combustible in nature.<span />
        
             
        
        
        
Answer:
It can cause land subsidence
Explanation:
 
        
             
        
        
        
Noooo not at all that's just bad for the environment
        
             
        
        
        
Answer:
insulin
Explanation:
the simple mould that grows on aging food is used to make insulin
 
        
                    
             
        
        
        
Answer:Adhesion 
Explanation:Is the attraction of water molecules to other molecules of different substances.  Water molecules are said to be polar which means that the molecule has a slightly negative charge and a slightly positive charge. This property of water allows it to interact with other polar or charges substances making it attract to other molecules.