Final answer:
FETCH is not an HTTP verb but an API in JavaScript for network resource retrieval. PUT, POST, and PATCH are all valid HTTP verbs used for updating or creating resources on a server.
Step-by-step explanation:
The correct answer to the question “Which of these is not an HTTP verb: PUT, POST, PATCH?” is D) FETCH. In the context of HTTP methods, PUT, POST, and PATCH are all valid HTTP verbs which are used for different actions to be performed on a server. The HTTP verb PUT is generally used to update a resource at a specified URI or create it if it does not exist, POST is most often used to create a new resource, and PATCH is used to apply partial modifications to a resource.
FETCH, however, is not an HTTP verb but is rather an API in JavaScript that facilitates the fetching of resources across the network. When working with web applications, it's important to understand the different HTTP methods as they define the action you're asking the server to perform on the resource identified by a given request.