What is an element selector in Angular?

An element selector in Angular refers to a custom HTML element that can be used within a template. This allows developers to create reusable components that encapsulate both the HTML structure and the associated functionality. When you define a component in Angular, you can specify an element selector, enabling the component to be treated like a standard HTML element throughout your application. For instance, if you define a component with the selector 'app-my-component', you can then use <app-my-component></app-my-component> within your templates.

The other options don't correctly describe what an element selector is in Angular. An attribute selector pertains to matching specific HTML attributes, a class selector is relevant in CSS styling rather than Angular components, and a directive for controlling application state does not capture the essence of what an element selector does in the context of Angular's component architecture.