Section I: Basic Concepts Relevant to Microeconomics provides a comprehensive overview of microeconomics and its fundamental concepts. The section consists of three chapters that focus on explaining the basic concepts of microeconomics. Chapter One: Economic Modeling introduces the concept of economic models as essential tools for economists to understand and predict economic issues. Chapter Two: Market Behavior and Decision-Making explains how economic agents make decisions regarding resource allocation, considering factors such as consumer preferences, utility maximization, and market forces. Additionally, microeconomics emphasizes the importance of logical reasoning and critical thinking skills, enabling economists to evaluate assumptions, develop decision-making abilities, and analyze empirical research to better understand complex economic issues. Chapter Three: Behavior of Economic Entities focuses on market interactions, providing insights into buyer and seller behavior in different market structures. It elucidates how prices are determined, resources are allocated, and how market conditions influence market participants. This understanding helps firms make informed decisions about pricing, production levels, marketing strategies, and resource allocation, contributing to their success and sustainability. In summary, Section I attempts to explain the foundational economic concepts, encompassing economic modeling, market behavior, and decision-making processes. Overall, microeconomics provides valuable insights into individual and firm behaviors, resource allocation, and market dynamics, making it a crucial field of study in the broader discipline of economics. It offers useful tools for policymakers, businesses, and economists to make informed decisions and understand the complexities of the economic landscape.