Antonio swings his arms while lying in his crib. One of his arms accidentally hits the mobile hanging above him. This causes the mobile to move. Antonio continues to swing his arms but is unable to strike the mobile again. This is an example of a .

Secondary circular reaction

Explanation:

Secondary circular reaction  is which infants tend to repeat the actions or activities intentionally that they found pleasurable in form of response .These activities are performed through their body parts like, hands, legs etc as well as objects like toys etc.This phase usually occurs when babies range from 4 months old-8 months old.

According to the question, Antonio is displaying secondary circular reaction by repeating the act of hitting his arm to move mobile so that it can swing again.  

you go to appeals court like section e

answer; motor learning;