Which AWS service provides a feature that can be used to proactively (CLF-C02)

Correct answer: C. AWS Trusted Advisor.
AWS Trusted Advisor is a feature that provides recommendations to help you optimize your AWS environment and resources. One of the key features of Trusted Advisor is the ability to proactively monitor and plan for the service quotas of AWS resources. It can identify service limits that are approaching their quota and provide recommendations on how to address them.

The other options are not directly related to proactively monitoring and planning for service quotas:
A. AWS CloudTrail is a service that records AWS API calls and related events.
B. AWS Personal Health Dashboard provides a personalized view of the health of your AWS resources and services.
D. Amazon CloudWatch is a monitoring and observability service that collects and tracks metrics, logs, and events.