What motion is used to send a pending question to a committee for further investigation?

The motion used to send a pending question to a committee for further investigation is to commit. This is essential in parliamentary procedure as it allows for a more detailed examination of the matter at hand, providing the committee with the opportunity to gather information, explore options, and make recommendations based on their findings. By committing an issue to a committee, members can focus on a specific area of interest or concern, without the need for immediate resolution in the full assembly.

This process facilitates thorough discussion and ensures that complex or nuanced topics receive the attention they deserve before any final decisions are made. The committee then reports back with its findings, which helps the larger body make informed choices based on comprehensive analysis. The terms "delegate," "assign," and "refer" do not specifically capture the formal motion to send a question to a committee in the context of parliamentary rules, making "commit" the most accurate choice.