Just what is action? Any time the characters are talking or moving is action. This is shown by developing a scene giving the reader a chance to identify with the characters. Scenes are used to characterize and there are large scenes and small scenes. Scenes are developed when an event is interesting, important or exciting.
A large scene is used when conflict occurs. There is a pattern. A meeting, an exploration of the conflict, a suggestion to the result and the result which may solve or deepen the conflict. This can be dome by showing the characters in movement, in movement plus dialogue or by dialogue only. In the conflict the opponents must want to eliminate, win, outlast or pacify the other party to the conflict. These large scenes can be used to show major or minor conflicts.
There's nothing worse that reading a story where what could be a major conflict is told rather than shown.
Minor scenes are used to characterize. to convey information the reader needs to understand the story and where needed to advance the story.