Answer:
An autotroph is a cell that is capable of producing its own energy using photosynthesis or, less commonly, chemosynthesis.
A heterotroph is a cell that must consume its energy from external sources, for instance, hunting for prey or eating autotrophs. 
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Answer: The “graying of America” 
Explanation: Just took the test
 
        
             
        
        
        
Answer: cuz someone could get hurt while on the site
Explanation: