What type of partner is not known to the community and does not participate in day-to-day operations?

The option referring to a secret partner is accurate in the context of a business partnership. A secret partner is someone who is involved in the partnership but whose existence is not known to outsiders or the general community. This individual typically does not publicly participate in the operations or management of the business, maintaining a low profile while potentially contributing to the capital investment or offering strategic insight.

In contrast, active partners are directly involved in the day-to-day operations and management of the business, while limited partners have defined liabilities and may contribute capital but are not involved in the everyday decisions of the business. Silent partners, on the other hand, are not typically involved in daily operations but are known to the public as partners. The unique characteristic of a secret partner is their concealed participation, distinguishing them from other types of partners.