In which of the following scenarios would an object act as a conductor?

An object acts as a conductor when electrons are able to move freely within it. This mobility of electrons allows electric charge to flow through the material, making it capable of conducting electricity. Conductors, such as metals, have a high density of free electrons that can move in response to an electric field, enabling efficient transfer of energy.

In contrast, when electrons are tightly bound, as indicated in another choice, they cannot move freely and thus do not create an electric current. Scenarios where there is no movement of electrons or where electron movement is variable also indicate a lack of effective conduction. Only when electrons can move freely can the material be classified as a conductor, allowing for the flow of electrical current.