Which solution will meet these requirements?

Explanations:

Amazon CloudWatch provides metrics for EventBridge rules in the namespace AWS/Events. By checking these metrics, the solutions architect can determine if the rule conditions are being met and if the rule is invoked. Specifically, metrics such as “Invocations” and “Failed Invocations” will indicate whether events are being processed successfully.

Reviewing the Amazon SQS dead-letter queue is not applicable unless the rule’s target is an SQS queue. Since the target is a third-party API, this option will not provide insight into whether the EventBridge rule is being triggered or if events are being sent to the target.

While checking Amazon CloudWatch Logs can help diagnose issues, it primarily provides logging of events and does not specifically show whether the EventBridge rule is being triggered or if the target API is receiving traffic. Without specific logging configured for EventBridge, this option may not give the required information.

AWS CloudTrail logs API calls made to AWS services, but it does not provide a real-time view of EventBridge event processing. While it can show that an event was sent to EventBridge, it won’t confirm if the event was processed or if the target was invoked, making it less effective for this requirement.