The Contentful Rich Text field on the front end can display links or linked entries and assets by utilizing the Contentful REST API and GraphQL API, which are used to query data from a content type in order to render links inside the Rich Text field. The Contentful JavaScript SDK is used to resolve linked entries and assets, and it provides a rich tree of data that converts raw nodes into a structured format for easier consumption. The include parameter can be used to specify the depth of the resolved tree, allowing developers to control how much data is returned from the API. Understanding the structure of the data responses from Contentful enables developers to choose which APIs and methods are best suited to their applications, and also empowers them to resolve linked assets and entries themselves if needed.