Which of the following would be difficult to assess using empirical research? a)the abilities of non-human primates to use sign language b)the reaction time for participants to indicate they heard a ball drop on a tablec)whether a baby is crying because he is sad, hungry, or in paind)whether the id, ego, or superego is most responsible for emotional reactions

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