Another arrow — dotted. Which arrow is the answer?

A dashed arrow in UML diagrams usually indicates a dependency or an asynchronous message, depending on the context.

In a class diagram, a dashed arrow represents a dependency, showing that one element uses or depends on another but is not part of its structure.

In a sequence diagram, a dashed arrow can indicate a return of a result or an asynchronous call.

The answer to the question "What arrow?" depends on the diagram's context, but generally:

• A solid arrow indicates a direct relationship (e.g., association, inheritance).
• A dashed arrow indicates a dependency or a return.

Thus, a dashed arrow points to a less strict connection than a solid arrow and is often used to denote dependency or callback.