Microsoft Azure Fundamentals AZ-900 Practice Question

Multi-factor authentication (MFA) is the correct choice because it provides an additional layer of security by requiring two or more verification methods, such as a password and a phone verification. This directly addresses the requirement for an "extra layer of verification." Single sign-on (SSO) simplifies user access across multiple applications but does not inherently add an extra verification layer. Passwordless authentication replaces the password with another method, focusing on a different user experience rather than adding a second layer to a traditional password-based sign-in. Regular password authentication with complexity requirements strengthens a single factor but does not add another.