John goes fishing regularly. He notices that he gets the best catch when the tide is highest, as more fish come close to the shore. Pictured are the Sun-Earth-Moon alignments on four different days. On which two days will John get the best catch?.

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada