Those word are in John 14:6  (Jesus answered, “I am the way and the truth and the life. No one comes to the Father except through me.) The meaning is that only through Jesus's death we can aproach God, "<span>the truth"- the  prophecies arrived in the person of Jesus, and the life because he gave his life to gain our life. </span>
        
             
        
        
        
The independant clause mean the simple subject which says that you can read a part of a sentence that makes a lot of sense. So in this sentence "Since you are writing a poem, how will you use metaphors?"
The dependent clause is the one that makes no sense while being alone. 
In this sentence the dependent clause is Since you are writing a poem.
It makes no sense all alone in one sentence.
Now for the actual question answer is the independent clause. 
The independent clause is how will you use metaphors?
I think that is the independent clause because it really makes sense even though it's a part of the question. 
 
        
             
        
        
        
One in five<span> teenagers in America can’t hear rustles or whispers, according to a study published in August in The Journal of the American Medical Association. These teenagers exhibit what’s known as slight </span>hearing loss.<span> The number of teenagers with hearing loss from slight to severe has jumped 33 percent since 1994.</span>
        
                    
             
        
        
        
No, because you are only preparing ideas.
Editing is important, but during the Pre-Writing process, don't worry about mistakes you make. You have time to edit and fix them later on.