What is the correct description of displacement?

Displacement is defined as the change in position of an object and is characterized by both a magnitude and a direction. This means that displacement is a vector quantity. In physics, vector quantities have both a size (how far) and a direction (where to), making option A the correct description of displacement.

Speed multiplied by time results in distance traveled, not displacement, thus illustrating that this option does not apply to the definition of displacement. Similarly, acceleration divided by time yields a measure of velocity, which is also not aligned with the concept of displacement. Lastly, while a scalar quantity provides magnitude, it lacks direction, which is essential for accurately describing displacement. Therefore, understanding that displacement encompasses both magnitude and direction reaffirms why it is categorized as a vector quantity.