What describes groups of people who collaborate for a specific purpose?

The term that describes groups of people who collaborate for a specific purpose is "organisations." An organisation is typically defined as a structured group of individuals working together to achieve shared goals. This can include a wide range of entities such as companies, non-profits, clubs, and other formal groups, all of which have clear objectives they strive to accomplish through collective effort.

Organisations often feature defined roles, responsibilities, and processes, allowing members to coordinate their activities effectively in pursuit of their common objectives. This collaboration can take various forms, including teamwork within departments, cross-functional projects, and broader strategic initiatives aimed at fulfilling the organisation's mission.

The other options do not adequately capture the essence of collaboration for a specific purpose as well as the term "organisations." For instance, business organisations focus specifically on profit-generating activities, while commodities refer to basic goods that can be bought and sold. Institutions typically pertain to established laws, practices, or organizations that serve a social purpose, such as educational or financial systems, but do not inherently define a collaborative group in the same way that organisations do.