Uses allegorical characters, gives moral guidance to the audience 
        
                    
             
        
        
        
Answer: 2- The poet repeats the word “perched” to show that the raven is threatening to the speaker, and this contributes to the mood of powerlessness in the poem.
Explanation: repetition is a literary device that consists in repeating certain words or phrases in a sentence or paragraph, in order to create an impact in the reader. In the given excerpt from "The Raven" we can see an example of the repetition of the word "perched" this shows that the raven is threatening to the speaker (it is always watching the speaker) and this contributes to the mood of powerlessness in the poem (because the speaker doesn't seem to be able to do something to stop the raven from watching him).
 
        
                    
             
        
        
        
The answer B.Since,Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. ... Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster.
        
                    
             
        
        
        
Answer: A road may be used to symbolize the following items:
A fresh start: By describing taking a new road, a writer may be using a road to symbolize a fresh start in life.
A journey: By describing a long and windy road, a writer may be using a road to discuss a long and difficult journey.
An exploration: By describing an opportunity to travel on an unknown road, a writer may be using a road to symbolize a great exploration.
Progress: By describing a road traveled in the past, a writer may be using a road to symbolize what has been accomplished or progress that has been made.
Explanation:
Edmentum answer. 
 
        
             
        
        
        
Yes because Alaska still runs on oil. Alaska's north slope has responsibly produced more than 18 billion barrels of oil since the discovert of the prodhoe bay oil field.