Final answer:
Any shape, including a square, circle, star, or triangle, in Microsoft Word, can have a shadow shape effect like Offset Center applied to it, which adds depth and visual interest.
Step-by-step explanation:
Applying a shadow shape effect such as an Offset Center can be done to any shape in Microsoft Word. This effect creates the appearance that the shape has a shadow behind it, giving a sense of depth or making the shape stand out on the page. It does not specifically refer to a square, circle, star, or triangle; rather, it can be applied to any of these shapes to enhance their visual impact. Microsoft Word provides users with a variety of formatting options for shapes, including shadow effects, which can be applied through the Format Shape pane or the Drawing Tools Format tab.