Final answer:
The object from which a thread is unwound will remain stationary, as dictated by Newton's first law of motion, unless other external forces are applied to it.
Step-by-step explanation:
If a thread is unwound from a stationary object, the object will remain stationary unless an external force is applied. This behavior follows Newton's first law of motion, often called the law of inertia, which states that an object at rest will stay at rest unless acted upon by a net external force. While unwinding the thread might create a disturbance along the thread itself, according to this law, it does not provide a net force on the object to cause a change in its state of motion.
In the context of the given options, the correct answer would be (2) The object will remain stationary. The object would only move if forces other than the act of unwinding were involved, such as if the thread were attached to another object in motion or if there were frictional forces in play.