Which motion allows members to express a specific recommendation about a pending motion?

The motion that allows members to express a specific recommendation about a pending motion is the amendment motion. When members wish to change or modify the wording of a pending motion, they can propose an amendment. This enables them to suggest different phrasing or content to better reflect their viewpoint or to enhance the original motion's clarity.

Amending a motion is a fundamental aspect of parliamentary procedure because it ensures that various perspectives can be integrated into the final decision-making process. By allowing specific recommendations, it encourages participation and ensures that the motion more accurately represents the group's intentions.

Other options serve different purposes: for instance, committing or referring allows a motion to be sent to a committee for further consideration, postponing delays discussion on a motion to a later time, and invoking a previous question seeks to close debate and bring a motion to a vote without further discussion. Each of these actions serves distinct roles in the parliamentary process, but they do not provide a mechanism for modifying and expressing a recommendation about the motion itself as amendments do.