What is an explanation of different UML Behavioral Diagrams?

Answer 1

Behavior diagrams show the dynamic behavior of the objects in a system, which can be described as a series of changes to the system over time.

Use case diagrams are behavior diagrams used to describe a set of actions (use cases) that some system or systems (subject) should or can perform in collaboration with one or more external users of the system (actors) to provide some observable and valuable results to the actors or other stakeholders of the system(s).

Activity diagram shows sequence and conditions for coordinating lower-level behaviors, rather than which classifiers own those behaviors. These are commonly called control flow and object flow models.

State machine diagram is used for modeling discrete behavior through finite state transitions.

Interaction diagrams include several different types of diagrams:

• sequence diagrams,
• interaction overview diagrams,
• communication diagrams, (known as collaboration diagrams in UML 1.x)
• timing diagrams.

See further details and examples in the provided link.