What is the function of the Fillet Feature in SolidWorks?

The function of the Fillet Feature in SolidWorks is to round the edges or corners of selected edges of a part. This feature is commonly used in design for both aesthetic and functional purposes. Rounding edges can reduce stress concentrations that might lead to part failure, improve the flow of a material during manufacturing processes, and enhance the safety and comfort of a product by eliminating sharp edges.

By applying a fillet, designers create a smooth transition between two adjoining surfaces or edges, which can also aid in assembly and reduce the potential for mechanical wear. Hence, option B accurately captures the primary purpose of the Fillet Feature, making it the correct choice.