Step 1: What is the Biosphere?
The biosphere is the zone of life on Earth, which includes the land, water, and atmosphere where living organisms can be found. It encompasses all ecosystems on Earth.
Step 2: Components of the Biosphere.
The biosphere consists of:
1. Biotic Components: All living organisms such as plants, animals, and microbes.
2. Abiotic Components: Non-living factors like sunlight, temperature, air, water, and soil.
Step 3: Conclusion.
The biosphere is critical to sustaining life on Earth, as it contains the ecosystems that regulate essential processes like nutrient cycling, climate, and energy flow.
Final Answer:
\[
\boxed{\text{The biosphere is the zone of life on Earth, encompassing both living and non-living components.}}
\]