In my opinion mixed layers would be the best choice
        
                    
             
        
        
        
The answer is C. A variety of antibiotics
        
                    
             
        
        
        
I think what they rely on is there experiment and how they do it
        
                    
             
        
        
        
Answer:
Option B. Renewable have no environmental concerns associated with them; nonrenewable cause damage to the environment. 
Explanation: Renewable resources are those substances which can be recycled or reused after using it. Examples of renewable resources are hydro energy, solar energy and tidal energy etc. Renewable resources are occurs naturally while nonrenewable resources are those substances which cannot be recycled. These substances causes pollution in the environment. It is also found naturally. Examples are petrol, diesel and wood etc. 
 
        
                    
             
        
        
        
There would be a lot of plants that would not be able to live because a lot of plants rely on bacteria to take nitrogen from the air and put it in the soil for the plants to use. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.