The image above depicts a semantic network model.

The model above indicates "has bark" as a characteristic of trees. A feature of network models is inheritance, which means that the characteristic "has bark"

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Applies to the node "tree" and to all connected nodes above it

Applies to the node "tree" and to all connected nodes below it

Applies to the node "tree" and to all nodes at the same level $($horizontally$)$

Applies only to the node "tree"