Physical aspects of an environment includes things that aren’t biological in nature. For example, topology, how the land itself is arranged, is a physical aspect of the environment. Are there mountain ranges present? Are there rivers? Lakes? Flat plains? Plateaus? How much light is present? Is there wind? These all play into the physical aspects of an environment.
The biological aspects of an environment comprise of the various organisms that live in, on, or around a location. What kind of grass grows in the area? What kind of trees? What animals are living here? These are the biological aspects of an environment.
