Amajor misconception about natural selection is that this mechanism "gives organisms what they want or need so they can adapt to an enviornment" explain why this is incorrect.

Natural Selection is the process by which organisms with higher fitness and adaptations better suited to their environment tend to survive, while organisms with unfavorable variations do not. Natural selection works with  the traits and adaptations already present in the organism, and simply selects the favorable ones.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.

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