Final answer:
The title that best completes the list of activities such as presenting new concepts for products, introducing new technology, and managing an enterprise with personal risk is 'Entrepreneur'. An entrepreneur is a key figure in economic growth, innovation, and in creating new or improved products and services.
Step-by-step explanation:
To present new concepts for established products and ideas, to introduce new technology that replaces existing products, and to organize and manage an enterprise with some personal risk describes the activities of an entrepreneur. An entrepreneur is a person who is willing to take on the risks and the challenges of creating something new in the marketplace. They may develop new technologies, find innovative ways to deliver products such as Amazon and FedEx, or improve existing products for a competitive advantage.
Entrepreneurs play a crucial role in the business cycle. They contribute to economic activities which can lead to the creation of jobs, the increase in Gross Domestic Product (GDP), and the general advancement of technology in society. Innovative efforts, although risky, can lead to substantial monetary success for the entrepreneur and provide the market with valuable products or services that did not exist before.
It is important to note that not all new ideas are protectable by patents or copyrights, for instance, novel methods of organizing a factory or training employees. Successful entrepreneurs understand that market competition provides a strong incentive for innovation, as it can result in higher profits and temporary market dominance until competitors catch up.