a) This is because the other choices are either way too early or too late. Plus kids enter puberty around middle school. 
 
        
             
        
        
        
Technology can definitely have a negative impact on the environmen, for example the current global warming is caused by the release of the greenhouse gasses into the atmosphere. 
But it can also have a positive impact, for example, it can serve to clean rivers or control devastating floods. 
So the correct answer is:C! 
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Answer: The Native Americans
Explanation: Hope this help you! :)
        
             
        
        
        
Answer: They do this through a process called "mutation".
It could also be genetic modification, depends on what your text or teacher teaches you tbh. 
 
        
             
        
        
        
It’s the 31st most freest in 2018. It has a free market economy