What type of material likely composes this volcano? 
Definitions:
Elastic Demand
Reflects how the quantity demanded of a good or service changes in response to a change in price; high elasticity indicates demand is highly sensitive to price changes.
Demand Curve
A graph showing the relationship between the price of a good and the quantity of that good consumers are willing and able to buy.
Perfectly Elastic
A situation in economic theory where the quantity demanded or supplied responds infinitely to changes in price.
Perfectly Inelastic
A situation in which the demand for a good or service does not change in response to changes in price.
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