Which part of Earth encompasses all areas where organisms can obtain the energy they need?

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

Answer: (A)

Verified step by step guidance

1. Understand the question: The problem is asking which part of Earth includes all areas where organisms can obtain the energy they need to survive. This requires knowledge of Earth's systems and their relationship to living organisms.
2. Define the term 'biosphere': The biosphere refers to the global sum of all ecosystems. It encompasses all regions of Earth where life exists, including land, water, and air, and is the zone where organisms interact with their environment to obtain energy.
3. Compare the other options: The lithosphere refers to Earth's solid outer layer, including rocks and soil. The atmosphere is the layer of gases surrounding Earth. The hydrosphere includes all water on Earth. While these systems contribute to the biosphere, they do not individually encompass all areas where organisms obtain energy.
4. Relate energy acquisition to the biosphere: Organisms obtain energy through processes like photosynthesis, consuming other organisms, or chemical reactions. These processes occur within the biosphere, which integrates the lithosphere, atmosphere, and hydrosphere to support life.
5. Conclude that the biosphere is the correct answer: The biosphere is the only part of Earth that encompasses all areas where organisms can obtain the energy they need, as it includes all living systems and their interactions with the environment.