Urban planner daniel burnham oversaw the design and construction of the world’s columbian exposition, but he made an even more important contribution to cities. what was it?

He answer is: His Plan of Chicago offered a blueprint for the orderly growth of the city. 
in his design construction, Urban planner daniel burnham provided a room for economic growth in his blueprint. Such as additional spaces for stores, large chunk of land for parks, some buildings that could be used for schools, transportation road, etc.