The poet states, “The green field sleeps in the sun.” means that the green field is very exposed to the hardship.
In the text above, the poetic device that is used in this poem is known as personification.
Note that "The green field sleeps in the sun, " means that fields are sleeping, but fields are nonliving things and cannot really sleep and as such, the poem uses rhyme too.
The metaphor tells about the extent to which the problem or issue and they affect the meaning of the poem as it tells that it connote hardship.
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