Which sphere encompasses all living things on Earth?

• A. Atmosphere
• B. Hydrosphere
• C. Lithosphere
• D. Biosphere

Answer: (D)

The biosphere encompasses all living things on Earth. It represents the global sum of all ecosystems and includes various habitats where life exists, ranging from the deepest oceans to the highest mountains. The biosphere integrates the interactions between living organisms, including plants, animals, and microorganisms, as well as their environments, which consist of the atmosphere (air), hydrosphere (water), and lithosphere (land).

Understanding the biosphere is crucial, as it highlights how living organisms depend on each other and their surroundings. It also emphasizes the importance of biodiversity and ecosystems in maintaining life on our planet. This choice aligns with the broader concept of life and its interrelations across different environments, making it the correct answer.