Plz answer this question.

Dear student,

i) The unlucky heir refers to the paper-seeming boy with rat's eyes. He had inherited his father's disease due to which his growth was stunted, bones were twisted and features gnarled. That is the 'gnarled disease' being referred to.
ii) A small child is sitting at the back of teh classroom: he is referred to as 'unnoted, sweet and young.' The whole class is dull and dim but this particular child is different from others. His eyes are full of dreams of being a squirrel and playing in a hollow tree.  
(iii) Two images of despair and disease are 'stunted, unlucky heir of twisted bones' and 'gnarled disease'.
(iv) The poem is 'An elementary school classroom in a slum' and the poet is Stephen Spender.

Regards