The error in this sentence is a A) pronoun-antecedent voice agreement error. But it should be noted that this has become more standard usage in common dialogue. 
        
                    
             
        
        
        
The chain starts from God and progresses downward to angels, demons (fallen/renegade angels)  so the answer is god
        
                    
             
        
        
        
A) It shows the effect people can have when they choose to help someone who needs it.
Explanation:
<u>The first three paragraphs of the poem seem dejected and helpless</u> where the student helplessly cribs and sees the self in a precarious situation.
<u>The next paragraph presents hope and support from the other side after which something is possible,</u> even as the issues the person is facing remain, he has support to go through the issues. 
So when the fifth paragraph arrives it has changed into a process of getting through and not being stuck.