the best example of a citys investment in infrastructure as a response to urbanization was the building of…

Brief Explanations:

Infrastructure refers to the basic physical and organizational structures and facilities needed for the operation of a society or enterprise. Roads are a key part of urban infrastructure, facilitating transportation and movement of people and goods in response to urban - growth. Government offices are for administrative functions, parks are for recreational purposes, and electric companies are for providing a service rather than being the most representative infrastructure investment for urbanization compared to roads.

Answer:

roads.