Here's why:

* Biosphere Definition: The biosphere is the zone of life on Earth, encompassing all living organisms and their environments.

* Living World: The living world includes all plants, animals, fungi, bacteria, and other life forms on Earth.

* Interconnectedness: The living world interacts with the Earth's physical environment (atmosphere, hydrosphere, geosphere), forming a complex and interconnected system.

Therefore, the biosphere is the scientific term that encompasses the entirety of the living world and its interactions with the Earth.