<span>The correct answer is letter A, disorders in individual genes are responsible for Down's syndrome.
This is a human genetic disorder that is associated with physical growth delays, characteristic facial features, and a mild to moderate intellectual disability. This is a condition in which the genes make a copy of the chromosome 21. </span>
<span><span>A. </span><span>Fats would be the correct answer. For an organism to have energy, fats are burned when the cell diet does not consist of the fat needed from the food intake. Fats are necessary in order to transport other nutrients. Some vitamins are even fat soluble which means they need fats in order to be transported. Such vitamins are A, D, E, and K. Fats also provide protection for the vital organs from pressure and change in temperature by providing proper insulation and cushion. It also helps regulate body temperature.</span></span>
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