Design an automated, scalable image-processing workflow (resize, crop, watermark) with easy monitoring and minimal effort. What should you use?

The correct answer leverages Workflows for orchestrating the image-processing tasks, which inherently provides scalability and automation for sequential or parallel steps. Cloud Logging seamlessly integrates with Workflows, offering centralized logging and monitoring of each step's execution, status, and any errors, ensuring easy observability. Cloud Composer is an Apache Airflow managed service, which is powerful but often overkill for simpler, event-driven workflows like image processing, and Dataproc is for big data processing, not workflow monitoring. Cloud Run with Apigee creates an API endpoint, which is not primarily for orchestrating internal processing steps. Cloud Build is a CI/CD tool, not designed for general-purpose workflow orchestration, and while it can trigger Cloud Functions, it's less ideal for managing complex, multi-step processing flows than Workflows.