The correct service is designed to help developers follow the path of a request through their application, which can consist of a combination of AWS services, resources, third-party services, and other components to create an application. It enables the identification and analysis of performance bottlenecks and pinpointing the root cause of issues. CloudTrail is for tracking user activity and API usage, CloudWatch is primarily for monitoring operations and performance, and CodeDeploy automates code deployments to any instance.