The seasonal movement of animals from one place to another (usually occurs in species with ability to flight and in large amount
        
                    
             
        
        
        
Glycerol is found in triglyceride. Glycerol is the main ingredient in vegetable oils and fats. It forms the base of triglyceride. 
        
             
        
        
        
Answer:
The answer is (C) studying how is has been affected by erosion
Explanation: