👉 The concept of a biosphere refers to an area or region that encompasses all living organisms on Earth, including plants, animals, microorganisms, and other forms of life. This area is divided into four main regions: land-based ecosystems (such as forests), oceans, seas, and aquatic environments; atmospheric conditions; and the atmosphere itself. Biospheres are often described in terms of their environmental and ecological role, which includes providing food for plants, supporting biodiversity, regulating climate, and contributing to the