Answer
This graph has eight vertices and exactly one bridge. The edge FG is a bridge.
Work Step by Step
In a connected graph, for any pair of vertices, there is at least one path with these two vertices as the endpoints of the path. If removing an edge makes the graph disconnected, then that edge is called a bridge.
This graph is a connected graph. However, if we remove the edge FG, the graph will be disconnected. The edge FG is a bridge. However, no other edge is a bridge, since we can remove any other edge without making the graph disconnected.
This graph has eight vertices and exactly one bridge. The edge FG is a bridge.
