As you can see in the picture presented below, the three classes of water have distinctive traits.
Pure substances contain only one element, they are not mixtures of different things.
The homogeneous mixtures have multiple elements, but they are so well blended together that you can't easily observe or separate them.
In heterogeneous mixtures, we can easily differentiate between different elements of the mixture.
 
        
        
        
Answer:
C
Explanation:   Well C is usually correct for everything 
:P
 
        
             
        
        
        
Answer:
the process by which green plants turn carbon dioxide and water into food using energy from sunlight
 
        
                    
             
        
        
        
The nucleolus is the central support structure
        
             
        
        
        
Galapagos islands are groups of island in the pacific ocean that are known to have a wide range of  native animals such as giant tortoise that found no where else on earth. These native animals helped Darwin in the development of the theory of natural significance which attributes to the biological significance of the Galapagos islands. Human species is a threat to the natural wildlife on these islands mainly due to poaching and destruction of natural forests that destroys habitat and also impacts negatively on biological diversity of living organisms.