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                                     By :- sumit kr. As we know that there is a big and important place of questions related to general knowledge in competition exams. So this post is also about to one of these topics our today's topic is dams of India. •what is Dam? A wall build across a river to hold back the water and form lake behind it known as Dam. •what is the main aim behind building a dam?     Dams are built for more than one purpose like:-.                                                 •Fishing •to generate hydroelectricity •water supply for irrigation •flood control •fulfill the need of water for drinking. •providing open water for navigation e.t.c......  some disadvantages of dam. •it have a harmful effect on marine life. •It  resulted in displacement of local communities. •it also induced earthquake and caused waterborne diseases. •it submerged a large area of forest under water. •it leads to a great soil-erosion. •sometimes it also causes floods. •water logging is a

Answer: The movement of  solute particles  take place from a region of higher concentration to a region where the concentration of solutes is low. This is diffusion. Similarly, osmosis involves the movement of  water molecules  from a region of higher concentration to a region of lower where the concentration of water molecule is low, through a semi-permeable membrane. This is a picture showing comparison between osmosis and diffusion.