MindMap Gallery US Population
This is a clear mind map for US Population, outlining 1990: Most populous country, 3 ways to look at US population, and more. Each category further branches into several levels. Under "1990: Most populous country," there might be aspects like the history of the US population, geographical distribution, and demographic structure; under "3 ways to look at US population," potential content could include methods of analyzing the US population from different perspectives (such as age, gender, ethnicity).
Edited at 2022-06-17 16:12:18