Answer: By explaining that most American children participate in sports, the author emphasized the scope of the problem. 
Explanation:
 
        
                    
             
        
        
        
Sorry for not explaining my answers cause there's a lot to answer but:
1 is compound
2 is interrogative
3 is clause
4 is simple
5 is conjunction i believe
6 is cause and effect
7 is inverted
8 is compound
9 is complex
10 is subject
11 is compound
12 is to buy
13 is to swim
14 is whom you met last week
15 is Since I do not want a hamburger, I will have a chicken sandwich.
16 is  Even though our car broke down, we made it to the concert on time.
17 is whose, which, whom, that
18 is not there
19 is Traditional farmers 
20 is The starving artist
21 is Each person
22 is We
 
        
                    
             
        
        
        
I feel like it's C&A but Idk bc it says that he hunts humans instead of animals is because he believes that man is superior to animals because animals do not feel. To contradict, General Zaroff believes that men are superior because they are able to reason. 
 
        
             
        
        
        
I believe the answer is B ^^
 
        
             
        
        
        
Answer:
If you need a sentence of your own, you can use this clause <em>Which is my favorite sport</em> as a non-restrictive relative clause to give some additional information about a sport. For example,
Cycling, which is my favorite sport, has never been absent from the Olympic program.
Explanation:
A complex sentence is a sentence that contains an independent clause and one or more dependent clauses. 
A dependent clause is a group of words with a subject and a verb. It does not express a complete thought, so it is not a sentence and can't stand alone.
<em>Which is my favorite sport</em> is a dependent clause as it cannot stand as a sentence by itself. 
So you need to add an independent clause to have a complex sentence.
<em>Cycling has never been absent from the Olympic program</em> is an independent clause. You add your clause <em>which is my favorite sport</em> simply  to give some additional information about cycling.