Answer:
DNA
Explanation:
The answer is DNA. It belongs to a class of molecules called the nucleic acids, which are polynucleotides(long chains of nucleotides)
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Good environmental decisions need to have scientific facts thus in order to make informed decisions,policy makers are advised by letter C. Environmental scientists. In addition, not only scientific means is needed to have a good environment but also should include the economic,social and ethical aspects.
Sympatric speciation is the evolution of a new species from a surviving ancestral species while both continue to inhabit the same geographic region. In evolutionary biology and biogeography, sympatric and sympatry are terms referring to organisms whose ranges overlap so that they occur together at least in some places.