Final answer:
The question may be misunderstood as it relates to historical events and demographic changes, not protests. The Mourning Wars occurred in the Northeast; the potlatch practice is linked to the Pacific Northwest; and major population growth and migrations primarily impacted the South and Southwest. Large-scale protests have notably occurred in urban centers such as the Northeast.
Step-by-step explanation:
The question appears to be asking about the regions in the United States where particular historical events, practices, or demographic changes occurred, rather than protests. However, if we infer that the student is asking about the nature of the reform and population movements in the U.S., it's clear from the provided reference materials that different events and cultural practices are associated with specific regions of the United States:
- The Mourning Wars were associated with the Northeast.
- The practice of potlatch is closely linked to the Pacific Northwest.
- Major population growth and migration between 1970 and 1990 occurred in the South and the Southwest, leading to significant demographic shifts in these regions.
Protests and social movements can vary in intensity and occurrence across different regions. Historical evidence, such as the organization of the March on Washington for Jobs and Freedom, suggests that large-scale protests have occurred in urban centers like Washington, D.C., located in the northeast of the United States. Overall, social reforms and significant events have been more effective or prominent in urbanized regions like the Northeast, while other types of cultural practices and demographic trends can be found in other regions, such as the Pacific Northwest, South, and Southwest.