Decision Tree, Entropy, Information Gain, Gini Index.
https://scikit-learn.org/stable/modules/tree.html#minimal-cost-complexity-pruning https://towardsdatascience.com/learn-how-decision-trees-are-grown-22bc3d22fb51#:~:text=Training%20a%20Decision%20Tree&text=This%20approach%20makes%20the%20decision,the%20features%20from%20the%20data.