Amir is 10 months old. He is able to push one toy aside in order to reach another that he wishes to play with. He is also able to imitate the gestures and sounds his parents make when they play with him. This is an example of:

coordination of secondary schemes.

Explanation:

The coordination of secondary schemes is one of the sub-stage of sensorimotor stage in the development occurring in an infant between the age range of 0-2 years. That is the stage when the infants start to understand the world through action and sensation.

The  coordination of secondary schemes is the sub-stage four of the sensorimotor stage, the infants begins to coordinate two actions they have learnt. It is characterized by imitations of actions or behavior and an improve in anticipation of events. This stage usually occur within 8-12 months.

In this case, Amir activity are considered as an example of  coordination of secondary scheme, because he falls at the age range, he was able to imitate the behaviors of his parents and practiced two actions he has learnt.

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.

a would be the answer