What do you believe are the most significant aspect that are the contributors to

What do you believe are the most significant aspect that are the contributors to

What do you believe are the most significant aspect that are the contributors to the physical and cognitive development with children in this life stage (Early Childhood)? What are some of the expectations in our culture for children and what might some of the barriers be to optimal development?
This post only has to be 100-200 words long. No need to write a full paper! Thank you