Match the appropriate terms from the list provided to the definitions.

Definitions:

The threat that can occur when an accounting firm or its staff has a financial interest in an assurance client

The threat that can occur when the assurance team needs to form an opinion on their own work or work performed by others in their firm

The threat that can occur when a firm or its staff acts on behalf of its assurance client

The threat that can occur when a close relationship exists or develops between the assurance firm $($staff$)$ and the client $($staff$)$