How does the phrase "little beasts of burden" affect the tone and effectiveness of kelleys speech

i think one answer could be this poet uses no rhyme.

well i need the text ?   *   *   /

you shopuld find your answers here if you need more. the answer is the infinite variety of human nature

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.