binary tree - SERP Analysis

https://en.wikipedia.org/wiki/Binary_tree

https://www.geeksforgeeks.org/dsa/binary-tree-data-structure/

https://www.w3schools.com/dsa/dsa_data_binarytrees.php

https://www.programiz.com/dsa/binary-tree

https://www.quest.com/binarytree/

https://leetcode.com/explore/learn/card/data-structure-tree/

http://cslibrary.stanford.edu/110/BinaryTrees.html

https://takeuforward.org/binary-tree/introduction-to-trees/

https://www.geeksforgeeks.org/dsa/types-of-binary-tree/

https://opendsa-server.cs.vt.edu/ODSA/Books/CS3/html/BinaryTree.html