Explain the relationship between DNA, genes, alleles, and chromosome​

The genetic code is organized in long strands called chromosomes, consisting of DNA and proteins. Organisms that reproduce sexually normally have a characteristic number of chromosome pairs, with each pair member coming from each parent. A DNA allele is the corresponding location on a chromosome.

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plant because they survive by water, sunlight, ex.

explanation:

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.