A nascent entrepreneur is defined as a person who is in the early stages of starting a new business. This stage involves laying the foundational groundwork necessary for launching a business, which includes activities such as developing a business plan, acquiring resources, securing financing, and establishing a business structure. The correct answer among the provided options is "Who is in the process of starting a new business".
Thus, the term 'nascent entrepreneur' aptly describes someone actively engaged in creating and starting a new business endeavor, capturing the dynamic and foundational phase of entrepreneurship.