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Lakes and rivers are bodies of water that are surrounded by land. Lakes are typically inland bodies of water that are larger and deeper than ponds, while rivers are natural flowing waterways that usually empty into a larger body of water such as an ocean or a sea. Lakes and rivers are essential sources of freshwater for drinking, irrigation, and transportation. They also provide habitats for a variety of plants and animals, and are popular destinations for recreational activities such as fishing, boating, and swimming.