Which component of Earth's systems includes ocean currents and the hydrologic cycle?

The correct choice, which identifies the hydrosphere, encompasses all water-related components of the Earth's system. This includes the oceans, rivers, lakes, and even water vapor in the atmosphere. Ocean currents are a significant aspect of the hydrosphere, as they involve the movement of water in the ocean, which influences climate and weather patterns.

In addition, the hydrologic cycle, which describes how water moves through the environment via processes like evaporation, condensation, precipitation, and runoff, is integral to the functioning of the hydrosphere. The connection between these processes and the various bodies of water is essential in understanding the Earth's systems and their interactions.

Other components, such as the atmosphere, primarily involve gases surrounding the Earth, while the biosphere pertains to all living organisms and their interactions with the environment. The geosphere refers to the solid Earth and its rock and soil components. Each component interacts with the hydrosphere, but only the hydrosphere directly includes the ocean currents and the hydrologic cycle.