The wall may represent obstacles in life that are to be overcome to lead a fruitful life. In the picture, those resources are represented by the height of the boys.
Explanation:
d.
The wall is a realistic obstacle that some are easy for some, difficult for others and impossible for others to surmount. In terms of social welfare, the wall's beyond must be a basic necessity every one must have. Hence the height is to be increased.
E. Increase in the height is a metaphor for affirmative action for the underprivileged which hep them curb the disadvantages they are born in. Some lack proper homes, some money and education and some are discriminated against.
