Which of the following represents the four main systems of Earth?

The four main systems of Earth are the geosphere, biosphere, hydrosphere, and atmosphere. The geosphere encompasses the solid parts of the Earth, including rocks and soil. The biosphere includes all living organisms and their relationships with one another and their environments. The hydrosphere refers to all the water found on Earth, including oceans, rivers, lakes, and even water vapor in the atmosphere. The atmosphere is composed of the gases surrounding the planet that support life and influence weather patterns.

This combination of systems is critical for understanding how different components of Earth interact with each other. For instance, the atmosphere and hydrosphere play significant roles in weather and climate, while the geosphere influences the distribution of ecosystems found within the biosphere. Recognizing the correct four systems helps construct a foundational understanding of Earth's processes and environments.