Answer:
To assert that legal segregation is harmful to children.
Step-by-step explanation:
This purpose can be backed from the following lines from the excerpt:
Quote, "... their race generates a feeling of inferiority... for [because of] the policy of separating the races is usually interpreted as denoting the inferiority of African Americans".
To create artificial separation creates artificial rifts between what the students of different races may distinguish between the possible as well as that which they cannot achieve. In this, if there is a outwardly limiting factor that is not controlled by the student itself but by the state, it would create a societal boundary that would, quote, "affect the motivation of a [African American] child to learn".