The biosphere is Earth's life zone, where conditions allow for life to exist. It is the part of the planet's surface and atmosphere that supports life. The biosphere extends from the top of the atmosphere to the bottom of the oceans. It includes all living things, as well as the physical environment that they inhabit. The biosphere is divided into several biomes, each with its own unique set of plants, animals, and environmental conditions. Biomes are determined by factors such as temperature, precipitation, soil type, and altitude. The major biomes of the world include:

- Tropical rainforests

- Temperate rainforests

- Temperate deciduous forests

- Grasslands

- Savannas

- Deserts

- Tundra

- Polar regions

The biosphere is a dynamic system that is constantly changing. Climate change, pollution, and other human activities are putting pressure on the biosphere and its inhabitants. It is important to protect the biosphere for the survival of life on Earth.