Loader Function:

• Part of the server build.
• Explanation: Loaders run on the server to fetch and prepare data that will be sent to the client.

Action Function:

• Part of the server build.
• Explanation: Actions handle HTTP POST requests like form submissions and are responsible for server-side operations such as updating data. They are executed on the server and do not form part of the client-side bundle.

Route Component (Default Export):

• Part of both the client and server builds.
• Explanation: The route component, being a React component, is indeed part of both the server and client builds in Remix. Initially, it is used on the server for server-side rendering (SSR) to generate HTML based on the route's data. This process improves the performance and SEO of web applications. After the initial render, the same component also runs in the client's browser, where it becomes interactive, handling user interactions and updating the UI dynamically.