Which organization type requires at least two people to be considered legal?

A partnership is defined as a business arrangement where two or more individuals share ownership and management responsibilities. To legally constitute a partnership, it is essential to have at least two partners, as the name implies. This structure allows partners to combine their skills, resources, and efforts to achieve common business goals.

In contrast, a sole proprietorship is owned by a single individual and does not require additional partners. A corporation is a more complex structure that can operate with one or more shareholders. While a joint venture can be formed by two or more parties, it is typically a temporary arrangement for a specific project rather than a permanent business structure like a partnership. Therefore, the requirement of having at least two individuals is specific to partnerships, making it the correct answer in this context.