Final answer:
One of the fundamental elements of supply-side economics is economic deregulation. Supply-side economics argues that economic growth can best be achieved by lowering barriers to production.
Step-by-step explanation:
Supply-side economics argues that economic growth can best be achieved by lowering barriers to production. One of the fundamental elements of supply-side economics is economic deregulation. By reducing business regulations, it allows for more flexibility in the economy, resulting in a greater supply of goods and services at lower prices. This theory developed as a response to the perceived failure of Keynesian policy to stabilize Western economies.