Poems may work in this question.
Hope this helps!
        
             
        
        
        
Answer:
In my opinion, the answer would be 2. The players who were working at the carwash impressed the customers with their hard work. 
Explanation:
I think this would be the answer because a relative clause gives more information about the noun, in this case the players, in the sentence. In addition, a relative clause begins with either who, which, that, and whose, these are called relative pronouns or where, why, when, these are called relative adverbs. 
The players= the noun
who= the relative clause
 
        
             
        
        
        
start by canceling out the answers it couldn't be
 
        
             
        
        
        
Answer:
Renewable fuels are fuels produced from renewable resources. Examples include: biofuels (e.g. Vegetable oil used as fuel, ethanol, methanol from clean energy and carbon dioxide or biomass, and biodiesel) and Hydrogen fuel (when produced with renewable processes).