An organization that coordinates and supports the response to security incidents that affect sites within a defined constituency is the correct answer.

This wording matches standard internet security definitions of a Computer Security Incident Response Team or CSIRT. A CSIRT exists to coordinate incident handling across a defined group or constituency and to provide technical support, analysis, and operational assistance so that affected sites can contain, remediate, and recover from incidents.

Google Security Command Center is incorrect because it is a Google Cloud security product that helps detect and manage risks in cloud environments and it is not the general organizational definition of a CSIRT.

An organization that provides a secure channel for reporting suspected security incidents is incorrect because providing a reporting channel is only one service a CSIRT might offer. The definition of a CSIRT requires coordination and support across a constituency, which is broader than a single reporting mechanism.

An organization that distributes incident related information to its constituency and other involved parties is incorrect because information distribution is a typical CSIRT activity but it does not capture the full role. The essential aspect of a CSIRT is coordinating and supporting response efforts, not only sharing information.

Full AWS Practitioner Certification Question