Final answer:
The industrial stage of urban development contributed to an increase in suburban living through technological advances such as the invention of the electric streetcar and the affordability of automobiles.
Step-by-step explanation:
The stage of urban development that contributed to an increase in suburban living is the industrial stage. During this stage, technological advances such as the invention of the electric streetcar and the affordability of automobiles allowed people to live farther from their place of employment and commute into the cities. Streetcar suburbs and later automobile suburbs developed along transportation lines, and suburbanization expanded as more families were able to own cars and consider suburban life as a result of the lower price of automobiles and the availability of low-interest loans for home construction.