Which traversal method processes the node in the sequence of left child, parent, then right child?

The method that processes the node in the sequence of left child, parent, and then right child is known as Inorder traversal. This traversal technique works by first visiting the left child node, then the current node (parent), and finally the right child node.

The significance of Inorder traversal, particularly for binary search trees, is that it retrieves the nodes in a sorted order. When you use this method, every time you process a node, you've already handled all the nodes in its left subtree, and you will handle all the nodes in its right subtree afterward. This guarantees that the output is sorted, which is a key feature and advantage when working with binary search trees.

Other traversal methods follow different orders: Preorder processes the parent node first, then the left child, followed by the right child; Postorder processes the left and right children first, then the parent node. The term "Traversal" is merely a general term and does not refer to a specific method. Thus, Inorder traversal is distinct in its approach and useful for specific applications, making it the correct answer to the question.