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What is Psychodynamic theory among the following is/are: and explain in detail?
I. Psychodynamic theories

 Psychosexual theory   -  Sigmund Freud
 Psychosocial theory    -  Eric Erickson
 Cognitive theory          -  Piaget

II.Behavioural theories

 Hierarchy of needs - Maslow
 Social learning theory - Bandura  
 Classical conditioning - Pavlov 
 Operant conditioning - Skinner