The answer is C, because it was done on purpose, therefore NOT naturally. Not done by nature. 
 
        
             
        
        
        
The most common antibiotic for infections is penicillin. 
        
                    
             
        
        
        
Pyramids of biomass display the weight of organisms at each level. Inverted pyramids of biomass can occur when the primary producer has a high turnover rate. Pyramids of energy are usually upright and are the best representation of energy flow and ecosystem structure.
I’m sorry if this didn’t help I’m still new to answering questions on Brainly
        
             
        
        
        
If the substances preform the same in a variety of test, the they are the same. This is because they should always be tested in multiple categorys to see if they are the same or at least alike.