What is the purpose of the falling action in the plot of a story ?

Falling action occurs right after the climax, when the main problem of the story resolves. It is one of the elements of the plot of the story, the other elements being exposition, rising action, climax, and resolution. Falling action wraps up the narrative, resolves its loose ends, and leads toward the closure.  Explanation: Here's a quick and simple definition: The falling action of a story is the section of the plot following the climax, in which the tension stemming from the story's central conflict decreases and the story moves toward its conclusion. ... Falling action is often confused for dénouement, the final part of the story.    

Idon’t understand this and wym