What anatomy is labeled with the letter D in the image below? 
Definitions:
Elastic
In economics, describing a situation where the supply or demand for a product is sensitive to changes in price, leading to greater percentage changes in quantity supplied or demanded.
Tax Increase
The act of raising the amount of taxes owed by individuals or businesses, often undertaken by governments seeking to boost revenue.
Supply Curve
A graphical representation showing the relationship between the price of a good or service and the quantity supplied at those prices.
Elastic Demand
A situation in economics where the quantity demanded of a good or service changes significantly as its price changes.
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