Answer:
I think its the first one but I'm not sure
 
        
                    
             
        
        
        
Answer:
the heart it is because the heart beats and it goes up and down
 
        
             
        
        
        
The answer is C(An Allele).
        
             
        
        
        
Answer:
Its how you see it. 
Explanation:
1.Life on Earth is based on carbon, likely because each carbon atom can form bonds with up to four other atoms simultaneously. This quality makes carbon well-suited to form the long chains of molecules that serve as the basis for life as we know it, such as proteins and DNA.
2.All life on earth <em><u>can be thought</u></em> of as "carbon-based." Just be careful about turning this around backwards. It is true that all living things contain carbon compounds... but the opposite is not true. Just because a certain material is referred to as organic does not mean it is or ever was alive.
 
        
             
        
        
        
I think the correct answer from the choices listed above is option B. Extrinsic  motivation is compelled by one’s own enjoyment. It is a behavior or response that is driven by external rewards so it will really depend on the individual. Hope this answers the question.<span />