Select the correct answer from each drop-down menu. because vitamins carry out various functions in the body, deficiency of different vitamins can have varied effects on the body. the primary role of vitamin d in the body is , and its deficiency may result in .

Primary role of vitamin D is to absorb calcium. It along with calcium, helps to keep bones strong. It also help to make the bone brittle.

Deficiency of vitamin D causes the bones to lose their strength. If body does not get enough vitamin D, then absorption of calcium is lost resulting in osteoporosis in adults and rickets children.

the wires in the toaster turning red and the toast crisping and turning brown

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).