A graph data structure consists of nodes connected by edges, where the nodes represent different entities and the edges show the relationships between them. It can be visualized as circles (nodes) connected by lines (edges), similar to a social network of friends where each person is a node and the lines indicate who is friends with whom.

1. Graph Data Structure
A graph data structure can be visualized as a set of circles (nodes)
connected by lines (edges). The circles represent different entities, and
the lines show the relationships between them. This can be compared to
a group of friends, where each person is a circle, and the lines between
them show who is friends with whom.