What are your answer choices?
...........................
It is the third one.The clue lies in the fact that he mentions "<em>the passions of</em> <em>men as incorporated with ..forms of nature..</em>."In this sense, it is clearly shown that this is not a reason why he chose to write poems connected with low and rustic life.Low and rustic life do mention ."..<em>beautiful and permanent forms of nature.."</em>He wrote using the real language of men in which there were not manners always, there were feelings.