Machine Learning is best described as:

1. Artificial Intelligence aims to simulate human intelligence in machines. 2. Machine Learning is a subsystem of Artificial Intelligence. 3. In it, computers learn from data using statistical techniques without being explicitly programmed. 4. Its algorithms, called models, are trained and tested on separate training and testing data. 5. Once accurate enough, the models are used to predict outcomes for new and unknown data. _Source: syllabus Informatics Practices Class 11, Ch 2 'Emerging Trends', S2.2.1 Machine Learning_