Action Execution Specification usage in Sequence Diagram

Question

As I read through UML Reference Manual 2004

there are some examples about action :

1)creating and destroying object

2)calling an operation

3)sending signal to other object

My First question is :

Does this mean that I should use action Execution Specification not Behaviour Execution Specification when I want to create those types of actions? As you can see

My Second question is :

In which cases I should use Behaviour Execution Specification ??

PS: I use Papyrus for modelling the above example

Answer 1

You actually read UML reference Manual 2004!? I guess it deals with UML1.5 (officially defined in March 2003) which should be different than UML2.x modeled thanks Papyrus...