What kind of rhyme scheme does this have

Why does patton seem undaunted about eating his rodent soup

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

Which work would represent a change to the artistic medium of this original work?