In the scenario described, which application is an example of a Web app?

A web app is a software application that runs on a web server and can be accessed through a web browser over the internet. In this case, ArkanShotz is an example of a web app because it likely operates in a browser environment, allowing users to interact with it using web technologies such as HTML, CSS, and JavaScript.

Microsoft Word is primarily a desktop application that is installed on a computer and does not operate through a web browser. Anita's calculator likely refers to a simple application that might not be web-based or might be a standalone program. Anita's laptop is a hardware device rather than an application, making it unrelated to the question of which application qualifies as a web app.

Thus, ArkanShotz stands out as the only example that aligns with the characteristics of a web app, as it can be used via a web interface and is built to leverage online functionality.