Lydia is a divorced mother who attends meetings with peers who share the same problems and stressful situations. there is no professional present at these meetings. what type of sessions is lydia attending?

The session that Lydia is attending to is a self help group. It is because a self help group is about people who come together because of their similarities in terms of their experiences and problems. They would come together and talk about it, solving their problems. This implies to what Lydia's session is attending to because she attends meetings with peers who share the same problem and situations like her.