What is the primary function of the Crease tool in the Sculpt environment?

The primary function of the Crease tool in the Sculpt environment is to add sharp edges to surfaces. This tool is essential for controlling the appearance of the geometry in sculpted models, particularly when you want to create defined transitions and edges between different forms. By applying creases, you can influence how the surface is subdivided, resulting in a more precise and angular silhouette rather than a smooth, rounded form. This is particularly useful in product design and character modeling, where specific features need to stand out or maintain a certain aesthetic.

In contrast, the other options pertain to different functionalities within the Fusion 360 environment. Creating new components involves beginning a fresh project or part design, while generating sketches is distinctly focused on laying out 2D profiles for extrusions or other operations. Modifying existing bodies concerns alterations that do not specifically involve the precision of adding sharp edges to a surface, thus differentiating the scope of the Crease tool's capabilities within the design workflow.