Which AWS offering will meet these requirements?

Explanations:

Amazon EventBridge is primarily used for event-driven applications, allowing you to connect different AWS services, but it does not specifically provide alerts for monitoring operating costs.

Compute Savings Plans are a pricing model that helps reduce costs for compute services, but they do not offer alerts or monitoring features for overall operating costs.

AWS Budgets allows users to set custom cost and usage budgets, and it can send alerts when costs exceed specified thresholds, making it the right choice for monitoring overall operating costs.

Migration Evaluator helps organizations plan their migration to AWS by analyzing on-premises workloads and estimating costs, but it does not provide cost monitoring or alerting capabilities.