Answer:
A. shaping
Step-by-step explanation:
Shaping: In psychology, the term shaping refers to the phenomenon of training or molding an organism including human beings or animals to perform a particular task or specific response through reinforcing any of the required responses that are similar to the desired response.
In other words, the process of shaping involves teaching someone to construct a desired task or behavior through the process of reinforcing every successful approximation of a particular task or behavior.
In the question above, the process explains the shaping.