I dont really understand the word
<span>efficacy
but the others dont seem to make sense to me so i would say D unless i just am misunderstanding a key concept </span>
<span>A rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. The prevailing winds are the winds that occur most of the time in a particular place of the Earth</span>
Huntington's disease (HD) is a revolutionary mind sickness caused by a faulty gene. This sickness reasons changes within the relevant location of the brain, which affect motion, temper, and thinking abilities.
Huntington's ailment (HD) is a deadly genetic disorder that reasons the progressive breakdown of nerve cells inside the brain. It deteriorates a person's bodily and mental skills usually throughout their top running years and has no cure.
Huntington's disorder is because of a mutation inside the gene for a protein referred to as huntingtin. The illness reasons the cytosine, adenine, and guanine (CAG) building blocks of DNA to repeat many greater instances than is normal. every child of a discern with HD has a 50-50 danger of inheriting the HD gene.
Learn more about Huntington's disorder here:
brainly.com/question/12572808
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