According to The Elements of Style, the correct way to punctuate this sentence is, Conservationists are considering urban runoff, and they are tracking population growth, but the magnitude of the situation has not been determined. 
Answer: Option C. 
Explanation:
Punctuations are the marks such as comma, semicolon, exclamation that we use while writing. Punctuation helps to give a clear meaning to the sentence. ‘The Elements of style’ is a book written by William Strunk which describes the proper way of writing style. 
From the sentences given below, the correct way to punctuate this sentence is, ‘Conservationists are considering urban runoff, and they are tracking population growth, but the magnitude of the situation has not been determined.’ Here we can see that after the dangler is separated with a comma. Apart from this in the first line, two ideas are being discussed which is further separated by adding comma thus making a sentence readable. 
 
        
                    
             
        
        
        
Answer:
Option D
Explanation:
Showing kindness towards others can improve your mood through positive social interactions and reinforcing the notion that you’re a good person is the statement best expresses the central idea of the text "Five Reasons Why Being Kind Makes You Feel Good".
 
        
             
        
        
        
Answer:
It represents warmth during the cold winter months.
Explanation:
 
        
                    
             
        
        
        
Answer:  express outrage when they feel that someone has transgressed against their sense of right and wrong,
Explanation:
In the realm of morality and politics, people usually “express outrage when they feel that someone has transgressed against their sense of right and wrong,” Brady explains. And finally, the statement has to evoke certain consequences: “Someone wants to hold someone else accountable, or punish them, or call them out.