Answer:
Testable prediction that gives direction to research.
Explanation:
A hypothesis is an explanation that can be accepted in a provisional way, but has the objective to provide sufficient guidance for further investigation.
It is also considered testable because it can be proven right or wrong, it means it is possible to be verified.
 
        
             
        
        
        
The answer would be Lindsay starts a yoga group with several friends from school. More and more students join the group each week". 
I hope this helps!
        
                    
             
        
        
        
The answer is:  "social epidemiology" .
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      " <u> Social epidemiology </u> i<span>s the study of the causes and distribution of health, disease, and impairment throughout a population."
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Answer:
you just have to practice.
 
        
                    
             
        
        
        
Nicotine affects the receptors in the brain and clogs the lungs with tar