Which AWS service assists with operational and risk auditing of your AWS account?

The correct answer highlights that AWS CloudTrail is specifically designed for operational and risk auditing within an AWS account. CloudTrail provides a comprehensive log of actions taken through the AWS Management Console, AWS SDKs, command line tools, and other AWS services.

By tracking API calls made in your account, CloudTrail enables users to assess the activity that has occurred, understand the changes made to AWS resources, and investigate any unusual behavior. This can be particularly important for identifying unauthorized access attempts, ensuring compliance with internal policies and external regulations, and maintaining an overall awareness of account activities.

In contrast, other options such as the AWS Management Console are primarily user interfaces for managing AWS services rather than auditing tools. AWS Organizations manages multiple AWS accounts, allowing a centralized way to manage them but does not specifically track operational activities. AWS Config focuses on resource configurations and compliance tracking but does not provide the detailed API-level audit capabilities that CloudTrail offers. Thus, AWS CloudTrail is uniquely positioned to assist businesses in operational and risk auditing significantly.