Question

what was one negative consequence of the popularity of the international style on world architecture?
loss of unique regional styles
growth of architectural firms
development of curtain wall structures
development of skyscrapers

Explanation:

The International Style emphasized simplicity and uniformity. As it became popular globally, it led to a reduction in the use of unique regional architectural styles which had distinct cultural, historical, and local - context - based designs. Growth of architectural firms (could be positive), development of curtain - wall structures (a technical aspect, not negative in this context), and development of skyscrapers (a form of architecture, not inherently a negative consequence of the style's popularity in terms of architectural diversity) are not the negative consequence related to architectural style diversity.

Answer:

loss of unique regional styles