...is a way of writing poetry that appeals to the elements in the natural environment.

I assume you are referring to "nature is a way..." Frost places a great deal of importance on Nature in all of his collections. Because of the time he spent in New England, the majority of pastoral scenes that he describes are inspired by specific locations in New England. However, Frost does not limit himself to stereotypical pastoral themes such as sheep and shepherds. Instead, he focuses on the dramatic struggles that occur within the natural world, such as the conflict of the changing of seasons (as in "After Apple-Picking") and the destructive side of nature (as in "Once by the Pacific"). Frost also presents the natural world as one that inspires deep metaphysical thought in the individuals who are exposed to it (as in "Birches" and "The Sound of Trees"). For Frost, Nature is not simply a background for poetry, but rather a central character in his works. You can read about this at the GradeSaver link below: