Final answer:
The form of entrepreneurship involving individuals within a corporation is known as Corporate entrepreneurship or intrapreneurship, enabling innovation and venture creation within an existing company.
Step-by-step explanation:
The form of entrepreneurship that involves individuals within an existing corporation is known as A) Corporate entrepreneurship (or intrapreneurship). Corporate entrepreneurship refers to the process of initiating new ventures, driving innovation, and promoting change within an established company. Unlike sole proprietorships and partnerships, where business is managed by individuals or co-owners collectively, or a corporation that is owned by shareholders, corporate entrepreneurship gives employees within a larger firm the opportunity to be entrepreneurial. This enables businesses to tap into new markets, create innovative products, and remain competitive in a changing economic landscape.