The first diagram shows the basic checkmate position with a rook, which can occur on any edge of the board. The black king can be on any square on the edge of the board, the white king is in opposition to it, and the rook can check from any square on the rank or file (assuming that it can not be captured).
Why are vitamins necessary in diet? vitamins are essential in diet because they prevent diseases such as rickets,osteomalacia ,scurvy. vitamin d promotes absorption of calcium and phosphorus compounds from intesâ¦tines and enables the body to use these in formation of teeth and bones.
Two nutrients are particularly important: 1  Calcium: âGetting enough calcium is important for all ages, but it's particularly important during adolescence and early adulthood, when bones are absorbing calcium ,â says Heather Schwartz, MS, RD, a medical nutrition therapist at Stanford University Hospital and Clinics.t every stage of women's lives, nutrition and regular exercise are the cornerstones of good health and optimal energy. But certain vitamins and minerals become especially important at particular times of life. Knowing which matter most can help you choose the best foods and supplements.