Tree is a Type of data structure consisting of different nodes arranged in a hierarchical manner.

Tree consists of different terminologies viz

1. Root node : It is the main Parent node at the top most of a tree.

2. Child node: Child of a parent node.

3. Leaf node : leaf node are those node which have no further children.

4. Siblings: children of same parent 

5. Degree : it is the no. Of branches connected to a node.