What type of contract involves basic skills that requires a specific individual to perform it?

The correct choice is a personal service contract, which is specifically designed for instances where an individual possesses unique qualifications or skills needed for a particular task or service. This type of contract acknowledges that the personal expertise or attributes of the individual are critical to the completion of the project or service being provided.

In many cases, personal service contracts are utilized in fields that require specialized knowledge or direct involvement from the contractor, such as arts, consulting, research, or technical areas. These contracts often emphasize the importance of the individual's capabilities and their direct contribution to the project’s success.

In contrast, standard contracts are typically more generic and do not focus on the individuality of the contractor's skills. Sole-source contracts are awarded to a specific provider when that provider is the only entity capable of delivering the required goods or services, but they do not inherently emphasize the personal skill set of a specific individual. Formal contracts simply refer to the structured and legal documentation of an agreement, without a particular focus on personal qualifications.