An organization needs to train a custom machine learning model to categorize customer responses from their website's contact form. Which Google Cloud product or service should the organization use?

Anthos is a hybrid and multi-cloud application management platform, not a machine learning training service.

Recommendations AI is a pre-built service for product recommendation use cases in retail, not a custom text classification tool.

AutoML Natural Language is a Google Cloud service specifically designed to let organizations build and train custom natural language processing models, including text classification tasks such as categorizing free-form customer responses. It handles model training and evaluation while requiring only labeled training data from the user. This makes it the correct fit for categorizing contact form submissions.

Pub/Sub is a managed messaging and event streaming service used for decoupling systems, not for training or running machine learning models.