Trees are a fundamental data structure in computer science that can be used to represent hierarchical relationships between elements. Think of a tree as an upside-down family tree, where the root node is at the top and the leaves are at the bottom.

In Python, trees can be implemented using various techniques, including:

• Using nested lists to represent the hierarchical structure.
• Creating custom classes to define nodes and their relationships.
• Leveraging built-in data structures like dictionaries or collections.

This module will explore the concepts of trees in Python, focusing on their definition, types, operations, and applications.