Question

which line is repeated in the poem heart of the tree and why??

Answer 1

here is your answer
the lines what does he plant who plants a tree are repeted .
the repetation of questions is called hyperbola
hoped this helped

Answer 2

Hi, here is your answer Adi.
The line "What does he plant who plants a tree?" is repeated in the poem for poetic effect. This type of figure of speech is called Hypophora. In this type of figure of speech, the poet asks a question and answers it himself.
Hope this helped you :)