Question

what is the significance of the chicago fire of 1871 on the history of modern architecture?
it was the result of excess wealth that led to what rousseau described as \moral decay.\
organic building materials like timber and thatch were replaced with more fire - proof materials like wrought iron.
it led to the development of skyscrapers by new and creative architects who learned to maximize small plots of urban land.
it increased awareness for the necessity of inventions like elisha otiss safety elevator.

Explanation:

The Chicago Fire of 1871 led to a shift in building materials. Organic, flammable materials were swapped for fire - proof ones like wrought iron, which was a key change in modern architecture's development.

Answer:

Organic building materials like timber and thatch were replaced with more fire - proof materials like wrought iron.