Final answer:
The answer to the fill-in-the-blank question is 'celestial body.' Weight is the force caused by the gravitational pull of a celestial body on an object, and it varies based on the celestial body's gravitational strength.
Step-by-step explanation:
The weight of an object is the force on the object due to the gravity of Earth or the gravity of another celestial body, where the object could be located. The correct answer to the question is C) Celestial body.
This force, known as weight, is the product of the mass (m) of the object and the gravitational acceleration (g) that the object experiences. The gravitational acceleration varies depending on the celestial body exerting the force. On Earth, gravity is approximately 9.80 m/s², which is used to calculate weight according to the formula F = mg, where F is the weight.
Additionally, it is important to note that weight is different from mass. Mass is the amount of matter in an object and does not change irrespective of location, whereas weight can change depending on the strength of gravity of the celestial body.