Which best describes one of the themes in spring is like a perhaps hand?

The word "perhaps" is used to provoke the idea of maybe, the perhaps hand will maybe move this here or that there, the observers look through the shop window wondering what will the next object be that is moved. There is a level of ambiguity playing here, a sense of wondering is suggested and the poet adopts this theme in the poem by using "perhaps hand" as a narrative description.