Workflow: Create Activity Stream record option is missing

Hi guys. Hope your doing great.

I just watched this video -> Lesson 2 - Creating a Workflow: When a Record is Saved - YouTube   and at minute 3:00 you can see the option to create a Activity Stream record, see picture:

with_ac.JPG

However, in my local 7.6.1.0 instance, there is no such option - see on this picture:

No_Activity_Stream.JPG

Any idea why or more important, can I do something to have Activity Stream show up there and work?

Thanks, KGM