Question

activity diagram doesn't contain ​

Answer 1

An activity diagram illustrates one individual activity.
It shows a business process .Fundamental elements of the activity are actions and contain ( decision making, division, merge , initiation , end etc )

It is also called a Flowchart .

It does not show any message flow from one activity to another.

Answer 2

The message part is not include in activity diagram.

Explanation:

• This activity diagram is also known as the flow chart, in which an action describes one specific activity. It shows a business needs.  
• Its core elements of the activity were acts and include choice making, selection, merger, etc.  
• It displays no signal flowing through any operation into the other, and it is a specifics process of that same device.

Learn more:

• Activity diagram: https://brainly.in/question/15406311