three ways to trigger a process from a process model?

AFAIK, The following are the correct options:

• Use a Start Process smart service
• Use a subprocess
• Call a web API

Please correct in case required.

https://docs.appian.com/suite/help/24.2/Ways_to_Start_a_Process_From_a_Process.html#starting-a-process-from-a-process

But this document is giving different answer can you please check this once

https://docs.appian.com/suite/help/24.2/Ways_to_Start_a_Process_From_a_Process.html#starting-a-process-from-a-process

But this document is giving different answer can you please check this once