question_answer 2)

What do you think is the colour of 'sour cream'? Why do you think the poet has used this expression to describe the classroom walls?    

Answer:

The colour of 'sour cream' is off-white or yellowish. Perhaps, the poet has used this expression to describe the classroom walls in order to underline the prevalent neglect. The dull colour and the suggested bitterness, echoes the situation of the children.