Organic matter and nutrients causes an increase in aerobic algae and depletes oxygen from the water column. This causes the suffocation of fish and other aquatic organisms. Sulfate particles from acid rain can cause harm the health of marine life in the rivers and lakes it contaminates, and can result in mortality.
        
             
        
        
        
Answer:
<em>She could be in many more circus performances if she'd learn when to stop clowning around.</em>
This is the sentence that contains the pun. 
What best explains the pun here is that Kiko is a circus act at a circus show but she does not know when to be serious as she gets so silly during rehearsals.
The show directors believe she would be in more circus performances if she would learn when to stop clowning around.
The pun here is clowning around.
Explanation:
A pun is a play on words. It is a literary device that has two different meanings.
From the answer above, a clown is someone that makes people laugh through making funny faces and jesting. A clown is usually found in a circus.
Kiko works in a circus and because of her playful nature, she doesnt appear in a lot of circus performances.
 
        
             
        
        
        
Answer:
true, quotation marks are used in direct and indirect qoutations
 
        
                    
             
        
        
        
Answer:
a day or period of celebration
typically for religious reasons