The answer is B. The lines of Latitude are about 69 miles apart. Each line of latitude is 1 degree of the angle of circumference of the earth, with parallel latitude lines lined up going East-West. Since the lines are stacked up north to south, your latitude describes your North/South position on the earth. Since these lines are parallel, their distance in generally constant.
Economic growth and development
It is Important because an unusual occurrence in the realm of international relation
Older glaciers have "longer" ice crystals than younger glaciers. Glacier from where there is more snow falls than snow melts, over a period of years. It is then compacted into ice. The longer the glacier is the older it is.