Climate change is the choice that answers your statement
        
                    
             
        
        
        
Answer:how can chemosynthetic organisms help scientists to understand how life developed on earth? for example, temperature, a species may evolve to a temperature change over time. it could alter the food sources available, and then that species would eat that food source and adapt to the energy given off by that source.
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Answer:    He told Healthline that the main factors driving the rise in heart disease are obesity and type 2 diabetes, but the real underlying culprits are moving less and stressing more. “What we aren't doing enough is getting up and out, spending quality time with loved ones daily, and smelling the roses,” Miller said.
Explanation: hope this helps :)
 
        
             
        
        
        
Answer:
the major factor is the decrease of deaths
 
        
                    
             
        
        
        
Answer:
Matter is the smallest particle of an element
Compounds is a mixture of two or more element