What effect does William Carlos Williams achieve by breaking up the words wheel barrow and rain water and placing them in separate stanzas, and how does this effect contribute to the theme of the poem?

It forces reders to read each word carfully and borrow and raindrops

The effect of breaking up the words wheel barrow and rain water and placing them in separate stanzas is that it creates a tone. It forces you to read the words barrow and water in a deeper voice creating the effect of falling words much like raindrops falling to the ground.