In Modules 19-21, I learned a lot about business, ranging from the different types of business structures to the functions of management. I learned that there are four primary types of business structures: sole proprietorship, partnership, limited liability company (LLC), and corporation. Each structure has its advantages and disadvantages in terms of liability, taxation, and control. Additionally, I learned about the different functions of management, including planning, organizing, leading, and controlling. These functions are essential for effective management of a business, and each function plays a crucial role in the success of a company. Furthermore, I learned about the importance of strategic planning in business and how it involves setting goals, determining the company's strengths and weaknesses, and developing strategies to achieve those goals. Overall, the modules provided valuable insights into the world of business and the different factors that contribute to a company's success.