It’s a homograph because it has different meaning and spellings but sound the same
        
                    
             
        
        
        
Answer:
They have pledged to save the environment
Explanation:
"Have pledged" is the simple past of "pledge"
 
        
             
        
        
        
Answer: The following idea
Explanation:
 
        
             
        
        
        
Answer:
Brain 
Explanation:
Because if we have brain we can win to everyone one.
No one can win us if we have Brain.
 
        
                    
             
        
        
        
C. He is highly regarded as an author.