Like the motif of nature is always as in "always" present in the novel. Too present that it's presence is the cause of the conflict, character development, drawing out themes and such. Even the main character of the narrative's way of thinking is related to nature and always talk about it such as animals, innate things and so on. In general 90% of the novel revolves around nature as nature revolves around the main character (the protagonist).

As a protagonist is described = it is the one where the plot revolves around on.

So is it possible for a motif to be portrayed as a protagonist by an author?