The correct answer is: B. Constant movement of water from ocean to land and back to ocean once again.
The water cycle is the continuous movement of water on, above and below the Earth’s surface. It is a natural process that helps to distribute water around the globe. The water cycle is driven by the sun’s energy, which heats the Earth’s surface. This heat causes water to evaporate from the surface into the atmosphere. The water vapor rises up into the atmosphere and cools, condensing into clouds. The clouds release the water back to the Earth as precipitation, such as rain or snow. The water then flows back into the oceans, lakes, rivers and groundwater.
Option A is incorrect because it describes an integrated attempt to recycle water in relatively arid regions. This is not the same as the water cycle, which is a natural process.
Option C is incorrect because it describes scientific management of water in areas excessively plagued with water-logging. This is not the same as the water cycle, which is a natural process.
Option D is incorrect because it describes water distribution in relatively dry areas. This is not the same as the water cycle, which is a natural process.