Explanation

AWS Service Catalog is the correct answer because it allows organizations to create and manage catalogs of approved IT services that users can deploy in a standardized and governed manner.

Key Features of AWS Service Catalog:

• Centralized Management: Create portfolios of approved AWS services and products
• Governance and Compliance: Enforce organizational standards and compliance requirements
• Self-Service Provisioning: Allow users to deploy approved services without needing deep technical expertise
• Version Control: Manage different versions of products and control which versions users can access
• Access Control: Control who can access which products and portfolios

Why Other Options Are Incorrect:

• AWS Control Tower: Provides multi-account governance and landing zone setup, not specifically portfolio management of IT services
• AWS Cloud Map: Service discovery for cloud resources, not portfolio management
• AWS Clean Rooms: Secure data collaboration service, not IT service portfolio management

AWS Service Catalog helps organizations maintain control over their cloud resources while enabling self-service provisioning of approved services.