Which situation would be classified as "interdiction"?

Interdiction is a legal process in which an individual is declared unable to manage their personal affairs due to reasons such as mental incapacity, severe illness, or disability. The correct answer identifies a situation where an adult is unable to manage personal affairs because of an infirmity, which falls squarely under the definition of interdiction.

When an individual is deemed incapacitated, a court may appoint a curator or guardian to oversee their personal and financial matters, ensuring that their rights are protected and their needs are met. This legal framework is designed to safeguard individuals who cannot make decisions in their best interest, reflecting the importance of having support and oversight in such sensitive circumstances.

Other situations listed do not involve the concept of interdiction. Making a will by an adult, a minor entering into a contract, and two parties agreeing on a business venture do not pertain to incapacity or the need for protective oversight that is characteristic of interdiction. Thus, the focus on an adult's inability to manage personal affairs due to infirmity directly aligns with the legal implications of interdiction.