Which of the following BEST describes centralized identity management?

Relying on a trusted third party (TTP) to provide credentials describes a federated or third-party identity model, not centralized management, because trust is delegated externally rather than consolidated in one provider.

Integrating identity system recognition across organizational boundaries describes federated identity management (e.g., SAML or OIDC federation), where multiple organizations agree to trust each other's identity systems rather than centralizing control.

Identifying an entity through behavioral analysis describes a behavioral biometrics or continuous authentication approach, which is an authentication method rather than a model of identity management centralization.

In centralized identity management, the service provider acts as both the credential store and the Identity Provider (IdP), meaning all authentication and identity decisions are managed within a single, unified system. This centralization gives one entity full control over user identities and access credentials without delegating trust to external parties. This contrasts with federated or distributed models where these roles are separated.