Briefly describe the two central purposes in studying the field of child development, and define the child study movement

Please provide the best answer for the best statement.

1. The two central purposes in studying child development are:
a. In order to contribute knowledge to the field of children’s development
b. In order tTo improve the lives of children
2. The child study movement, fostered by Alfred Binet and G. Stanley Hall, began at the turn of the 20th twentieth century in both Europe and the United States and advocated scientific research on child and adolescent development, and the improvement of conditions for children and adolescents in the family, school, and work place.