Answer: Amazon CloudWatch

Amazon CloudWatch is a monitoring service that can be used to create metric filters and dashboards to detect anomalous activity in your AWS environment. It can collect and track metrics, set alarms, and create custom dashboards to visualize your data. This can help you identify potential security issues and take appropriate action. Option A, B, and D are not designed for this specific task, as they are focused on storage, compute, and relational database services, respectively.

Author: LeetQuiz Editorial Team