Answer:
Self-determination theory
Explanation: 
Self-determination theory observes how individuals go pursuing fulfilment, a state of well being that includes:
 <em>The psychological needs and the growth are essential to Self-determination theory: The feelings of confidence, autonomy, relatedness</em>
<em> </em>
Being able to matter in the life of other people, having a sense of mastery over the environment, and autonomy concerning others was self-initiated, wholeheartedly to begin actions without asking for others opinion. 
Motivation will be the centre of this theory, so an example will typically be :
If someone decides to learn something and engage immediately without hesitating and not to take into consideration the level of difficulty neither the opinion of his friends or social connotations related to it.
Doing something for the sake of it will be referred to as self-propelled behaviour.
 
        
                    
             
        
        
        
Answer:
The transactions of a bus going 20 miles per hour due to quantum physics.
 
        
             
        
        
        
In most cases, the engineered works will have a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as slack water levels, often just called levels.
 
        
             
        
        
        
By studying it we can tell how long life has existed in earth and how different plants and animals are related to each other.