What Is The Meaning Of The Natural World?

The definition of the natural world is, everything that exsists on the earth, and in our universe, that is not  manufactured or man made. This includes plant life, animal and insect life, soil, rock sand deserts. The mountain ranges and all the different habitats that exist on the earth, and the universe.
The seas and the life in them, including all the processes carried out by each species each day  to survive and produce the next generation and continue their line.
Naturalists, ecologists, marine biologists and others, study these phenomena, daily ,weekly and yearly, to tell us how the environment is evolving, and which species are under threat and should be protected.