You absorb vitamin d from sunlight shining on your skin.
Vitamin d can help the absorption of calcium, which is capable for strengthening your bones and teeth.
Therefore if u r lacking of vitamin d, your bones and teeth may be soft, and especially among children, you may get ricket, where the legs are bent outwards.
Individuals of the same species that live in the same area is a population
<span>At the base of Arthropoda.</span>
A. Order, Arrangement, world and Universe
