What are the elements in the Collaboration diagram?

UML collaboration/communication diagrams are utilized to investigate the dynamic nature of your program. It shows the message stream between objects in an OO application, additionally suggests the fundamental affiliations (connections) between classes. This Collaboration diagram has three elements,

1. Object: The interaction between objects takes put in a system.
   
2. Relation/Association: Association among objects is connected by connecting them.
   
3. Messages: An arrow that commencing from one object to the destination object.
   

Sample Collaboration diagram,