Verbal communication is:

An aspect of communication

The part that is least remembered

Prioritised over non-verbal

Passive style is:

A useful communication mode in conflicts

The communication mode of passive people

A communicative mode of responsibility avoidance

Assertive style:

It is used by people capable of listening but also of asserting their own ideas

It is a style that can be alternated with the passive-aggressive style

It is a useful communication mode for asserting oneself and one's ideas