Question

is composed a action verb

Answer 1

It depends,

    If this is "They composed the music piece wonderfully"

-> Yes! This is a verb because here composed desribes an action.

    If this is "They were very composed while this was going on."

-> No! In this case composed is an adjective. It is describing them, they were composed.

Answer 2

Answer:

Explanation:

This should be marked with a red flag. but if it is what I think it is, then you want either an example or a definition.

The simplest definition is that an action verb does something. It is not a transition of any kind.

Example

He ran joyously to meet his parents who were just coming home. Ran is the action verb.