Why do people who live in extremely dry region sometimes use the process of designation

What words or phrases you to recognize the historical context of the line 7

This is the political, social, cultural, and economic 'time and place' surrounding the creation of a literary text.

How would “in a station or the metro” change of the bough was bright and lovely rather than wet and black a: the station would seem cheerier b: the poem would not be considered imagist c: the people would seem less pleasant. d: the poem would no longer be hokku