Which cell behavior depicted below is involved in the tube formation that underlies the development of lungs and trachea? 
Definitions:
Legal Domination
Legal domination is a concept in sociology referring to a form of authority where individuals or groups exert control through a system of laws and regulations that are formally established and often enforced by a state.
World's Wealth
The total value of financial assets, resources, and property owned globally, often analyzed in terms of its distribution across different populations and countries.
High-Income Asia-Pacific
Regions or countries in the Asia-Pacific area that have a high level of income per capita, indicating advanced economic development and a higher standard of living.
North America
A continent located entirely in the Northern Hemisphere and almost entirely in the Western Hemisphere, bordered by the Arctic Ocean, Atlantic Ocean, and the Pacific Ocean, including countries like Canada, the United States, and Mexico.
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