Answer:
B
Explanation:
They altered rocks into soil that was able to support simple plants such as grasses. This is an example of altering the environment around them to make it more habitable for other species. 
 
        
             
        
        
        
Answer:they convert light energy! they play a big part in photosynthesis 
Explanation:
 
        
             
        
        
        
Answer:
The characteristics of cells to divide and convert into specialized cells makes it possible for the different levels of organizations to occur. Specialized cells perform specialized functions which are necessary for the body of each organism. The working of these specialized cells allows the formation of the specialized tissues and the levels of organizations continue. Hence, we can consider the ability of the cells to multiply and divide into specialized cells as the basic characteristic due to which levels of organization occur.