To prevent from succeeding.
        
             
        
        
        
Answer:
D
Explanation:
I hope you have a nice day!
 
        
             
        
        
        
A shadow because there no bird that you can see 
        
                    
             
        
        
        
The sentence having an infinitive that functions as an
adverb is ‘By late in the afternoon, we were worried to hear the reports of the
storm. ‘ Here, the verb ‘to hear’ which is an infinitive as well was described
by and adverb ‘worried’.