Which machine learning technique is primarily responsible for enabling personalized product recommendations in major online retailers like Amazon?

Machine learning and artificial intelligence are transforming the retail landscape through sophisticated algorithms and data analysis. These technologies help retailers optimize inventory, personalize recommendations, predict consumer behavior, and enhance the overall shopping experience. Test your knowledge about how the science of machine learning is revolutionizing retail operations and customer engagement.

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Collaborative filtering algorithms
Natural language processing (NLP)
Facial recognition systems
Blockchain verification protocols