Which of the following was a significant effect of Western imperialism in the twentieth century? a The decline of migrations to industrialized countries b The development of nationalism among colonized peoples c The systematic deterioration in public health conditions d The conservation of the environment in colonized areas

B. The development of nationalism among colonized peoples

Explanation:

A significant effect of Western imperialism in the twentieth century is "The development of nationalism among colonized people"

This is evident in the rise of agitation for self-rule or self-government whereby the countries in western imperialism are being practiced and for independence from colonial rule.

This is shown by the Indian movement for self-rule around the 1940s, and many African countries in the 1950s to 1970s

a population change of 12.1%

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