Sometimes it shows up in his poem, so read it and understand it, and find out what he wrote about, then make a right question to fit his poem, well I can't explain haha but if the poem talking about wars for example then I will ask why did he talk about that ? Then I will find out from his poem that he said about the country value and losing a home value, so then we can guess that the teacher wants you to write is about that he has a home or a country and he lost it because of some reason ( maybe mentioned in the poem) and for that lost and hard feelings he had, he made this poem talking about wars, or about heart broken and losing a girl if his poem was about love ... So yes you can guess and find out from the poem, try to understand and understand the hiding meaning or the hiding title of His poem and remember I'm not a teacher, I'm just saying what I know :x

yes i believe that is what she asked for me to do. i mean, how am i supposed to know the reason why the writer wrote that poem. or in what condition from the past did the writer had to write that poem. i am just clueless.

I think it means "the reason of the poem's writer", why did he/she wrote it (a hiding story or topic between the poem lines, that shows the meaning of why its wrote), but ask the teacher again to make sure hehe .