Final answer:
A joint venture is the business structure where two or more businesses collaborate on a new venture, combining resources while sharing risks and rewards.
Step-by-step explanation:
The business structure that often involves two or more businesses starting a new venture together is known as a joint venture. This arrangement allows different parties to combine their resources, expertise, and strengths to pursue common business objectives while sharing risks and rewards. In contrast, a sole proprietorship is organized by one individual, a Limited Liability Company (LLC) can be single-member or multi-member and provides limited liability protection, and a corporation is a large formal legal structure that can raise capital through selling shares.