Which AWS service, tool, or feature helps companies reduce costs by identifying underutilized Amazon EC2 instances?

Explanations:

Amazon Inspector is a security assessment service that helps identify vulnerabilities and deviations from best practices in applications deployed on AWS. It does not focus on cost optimization or identifying underutilized resources.

AWS Trusted Advisor is a resource that provides real-time guidance to help users provision their resources following AWS best practices. It includes cost optimization checks that help identify underutilized Amazon EC2 instances, allowing companies to reduce costs effectively.

Consolidated billing is a feature that allows multiple AWS accounts to be billed together, providing a single bill for all accounts. While it can help with cost management, it does not specifically identify underutilized EC2 instances.

Cost Explorer is a tool that allows users to view and analyze their spending on AWS services over time. While it helps track costs and spending patterns, it does not specifically identify underutilized EC2 instances.