Option 1 -> Adam Smith wrote "The Wealth of Nations" (1776), establishing foundational principles of free market economics.
Option 2 -> John Maynard Keynes developed Keynesian economics in the 20th century, focusing on government intervention.
Option 3 -> Amartya Sen is a modern economist known for welfare economics and development theory.
Option 4 -> Abraham Maslow was a psychologist famous for his hierarchy of needs theory, not an economist.
Hence, Option 1: Adam Smith -> Adam Smith is universally regarded as the father of modern economics. His seminal work "An Inquiry into the Nature and Causes of the Wealth of Nations" (1776) laid the foundation for classical economics. He introduced key concepts like the "invisible hand," division of labor, and free market principles that continue to influence economic thought today. -> correct