Well you can coordinate the test material by key words and subjects
        
                    
             
        
        
        
Cell membraine i hope that help
        
             
        
        
        
The correct answer is C. An ecosystem service
Explanation:
In ecology, an ecosystem service refers to processes or elements that are part of the natural environment but besides this represent benefits for humans, this includes organisms and processes involved in the decomposition of waste and also pollination. Pollination is an example of an ecosystem service because, in pollination insects, birds and other organism or even wind transfer pollen which makes possible plants fertilization and this is essential for crops in agriculture, which means humans benefit for pollination and therefore this is an ecosystem service.
 
        
             
        
        
        
There are different star systems. Binary star systems consist of two stars. Multiple star systems consist of two or more stars. The meaning of star system is "A small number of stars." 
I think it's either A) a group of hundreds of stars, or B) a group of two or more stars. I would assume it's B), but i could be wrong.
Hope this helps!
 
        
                    
             
        
        
        
Answer:
Explanation:because of electricity the coal amount will decrease