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Rainwater harvesting
Plant body is greatly reduced
Leaves are reduced and small-sized with thick cuticles
Farm pond
Column A
Column B
1. Lagg_Farm_pond_-_geograph.org.uk_-_715243.jpg 
2. 800px-Rainwater_harvesting_tank_(5981896147).jpg 
3. 800px-Kleine_Wasserlinse_(Entengrütze).jpg 
4. ShrubofacaciaarabicaandanthillatKambalakondaVisakhapatnamw400.jpg