I’m pretty sure it’s number 3. I’m sorry if it’s wrong.
        
             
        
        
        
One organism benefits and the other isn't affected.
Hope this helps!
-Payshence 
 
        
             
        
        
        
Answer:
If it rained tomorrow,we would not be able to play.
 
        
                    
             
        
        
        
Answer:
Transporter
Explanation:
Trans means - across so it relates to " one end of the large port to the other" 
port means - carry which relates to "carries"