Which application feature involves a username, password, and submission button?

The feature that involves a username, password, and submission button is basic authentication. This method requires users to enter a username and password on a login form. When the information is submitted, the credentials are sent to the server for verification. If the credentials are valid, the user gains access to the application.

Basic authentication is a straightforward and widely used method for ensuring that only authorized users can access a system. It is commonly implemented in various applications and websites, providing a fundamental layer of security by allowing only those with valid credentials to log in.

Other options, while important in the realm of authentication, do not specifically require a username, password, and submission button in the same way. For instance, social login integration allows users to authenticate using their credentials from social media accounts, thus not requiring a separate username and password for the application in question. Single sign-on enables access to multiple applications with one set of credentials, effectively streamlining the login process but does not maintain the traditional username-password dynamic for each application. Multi-factor authentication adds additional security features, like a one-time code sent to a mobile device, but also doesn't consist solely of the username and password submission process.