Questions: The is the system whereby water continuously moves from the atmosphere to the land, plants, oceans, and freshwater bodies and then back into the atmosphere.
Transcript text: The $\qquad$ is the system whereby water continuously moves from the atmosphere to the land, plants, oceans, and freshwater bodies and then back into the atmosphere.
Solution
The answer is the last one: the hydrologic cycle.
Explanation for each option:
Hydrology element: This term refers to components or aspects of hydrology, the study of water, but it does not describe the continuous movement of water in the environment.
Runoff cycle: This term refers to the part of the water cycle where water flows over the land surface, but it does not encompass the entire system of water movement.
Precipitation index: This term refers to a measure of the amount of precipitation, but it does not describe the entire water cycle.
Planet's relative humidity: This term refers to the amount of moisture in the air relative to the maximum amount the air can hold at a given temperature, but it does not describe the entire water cycle.
Hydrologic cycle: This term accurately describes the continuous movement of water from the atmosphere to the land, plants, oceans, and freshwater bodies and then back into the atmosphere.
Summary:
The hydrologic cycle is the system whereby water continuously moves from the atmosphere to the land, plants, oceans, and freshwater bodies and then back into the atmosphere.