<span> B. organisms that use the same resource </span>
Wind is the agent of erosion that creates sand dunes. The wind blows grains of sand into a sheltered or otherwise secure location, allowing gradual accumulation.
The answer is to keep out invaders<span>
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From the root of the word, the answer should be from ten to nineteen, because comes from teen and age but most of the time is applied from 12 to seventeen, considering 12 the finish of the childhood and eighteen the beginning of the adult life so as an int variable the correct answer is 12 to 17.