Which of the following sustainable methods are effective for managing water-logging?

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Using tube-wells to facilitate irrigation and vertical drainage.Properly planning and designing future canal systems.Cultivating eucalyptus trees in areas affected by water-logging.All of the above methods combined.None of the above.

Explanation

Effective control of water-logging involves multiple sustainable approaches: installing tube-wells to aid irrigation and drainage, designing canals with proper planning, and planting eucalyptus trees to absorb excess water. Therefore, all these methods collectively contribute to managing water-logging efficiently.