Question

An effective moderator of a group discussion

tells participants what they should say.
encourages contention and disorder.
introduces personal opinions into the discussion.
helps the group remember the rules of discussion.

Answer 1

Helps the group remember the rules of discussion.

A good moderator is neutral and facilitative: they keep discussion focused, ensure everyone follows the ground rules and has a chance to speak, and avoid telling people what to say, stirring up conflict, or inserting personal opinions.