A person who organizes, operates and assumes the risk for a business venture is a/an ___________.

The term that best fits the description of a person who organizes, operates, and assumes the risk for a business venture is "entrepreneur." An entrepreneur is typically characterized by their innovative spirit, willingness to take risks, and ability to create and run a business. They identify opportunities in the market and develop a business model around those opportunities, often investing their own resources to start and grow the business. This role involves not just the financial aspect but also the strategic planning, operational management, and leadership necessary to drive the venture towards success.

In contrast, an investor primarily provides capital and may not be involved in the day-to-day operations of the business. A manager usually oversees the operations and staff within a company but does not necessarily assume the risk associated with the ownership of the business. Employees are individuals who work for a company but do not take on the personal risk or responsibility associated with starting or running a business. Hence, the entrepreneur's unique role encompasses both the initiative and the risk-taking that are crucial for launching and sustaining a business venture.