Answer: The correct answer is: In this sentence it seems to refer to a group of people who have been mistreated and humiliated, it may be in the work, social or economic aspect and could refer to black people, taking into account the time it was written the poem.
Explanation: In the poem From the Dark Tower the speaker apparently was a person who knew the countryside, nature, plantations, could be a sower and uses this language to express with metaphors the problems of daily life.