The structure in the photograph is a(n) 
Definitions:
Society's Welfare
The overall well-being and quality of life of a community or society, influenced by economic, social, and environmental factors.
Marginal Cost
The cost added by producing one additional unit of a product or service, a critical factor in economic decision-making.
Society's Welfare
The overall well-being and standard of living of the community or society as a whole.
Marginal Cost
An additional cost incurred for producing one more unit of a product.
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