C. the alge, zooplankton, insect, and bluegill populations would all be affected.
 
        
                    
             
        
        
        
Without the greenhouse effect, there would be more ice on Earth’s surface. The answer is B.
        
                    
             
        
        
        
The pH of the stomach in the digestive system is known to be very low, and acidic, so it can break the bonds between molecules, to which the nutrients diffuse into your blood, energizing you. 
        
             
        
        
        
1. A trait is an element of personality that is relatively stable throughout the lifespan and across contexts. And Characteristics is a description of someone’s or something’s features.
2. Technically yes
(Sorry I didn’t know #3)
4. It’s a gene
        
             
        
        
        
Answer:
D. Predator-prey!
Hope This Helps! And that I wasn't too late!