What is labeled A in this picture? 
Definitions:
Farm Output
The total quantity of agricultural products produced by a farm.
Parity Ratio
A term not defined in standard economic texts, potentially referring to comparative measures of commodities, incomes, or other economic indicators, effectively requiring further context for accurate explanation.
Farm Subsidies
Financial support and assistance provided by the government to farmers and agribusinesses to supplement their income and manage the supply of agricultural commodities.
American Institution
Organizations, principles, or traditions that are foundational to the society and culture of the United States.
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