Answer: B) Synchrony
Step-by-step explanation:
Synchrony is the mechanism in which infants and mother or father have matching feeling, emotional and responses towards each other .They show same emotional capability towards each other through responses like expression, feeling, states etc.,
According to the question, synchrony is displayed as Jimmy and his father are able to respond to each other along with emotional potential. They are sharing smiling and happiness surprising look with each other which indicates matching emotions.
Other options are incorrect because symbiosis, polarization and psycho-socialization is not depicted through scenario. Thus, the correct option is option(B)