Answer:
What happens is Poe implies incestuous relations sustained the genetic line and that Roderick and Madeline are the products of extensive intermarriage within the Usher family. In the end, both houses “die” at the same time: Madeline falls on her brother, and the mansion collapses.
Explanation:
Please mark brainliest
 
        
             
        
        
        
Answer:A
Explanation:
In the first paragraph it says it will leave scientists dizzy and in the second it says the scientist community will tear it down 
 
        
                    
             
        
        
        
Knowing about a danger and bravery are connected because in both you are knowing about the danger, when you are brave you will face the danger that you know about, if you just know about the danger you don’t have to be brave however. But if you know about danger and go for it anyways you are brave to do so. (Sorry if this doesn’t help)
        
             
        
        
        
Your answer would be "D" because it explained everything is beautiful but at the end it said, "But within the dense shadows, all seemed dark and gloomy as the grave." Hope this helps!