Which of the following options allows transforming an entire layer?

The Layer Transform tool is specifically designed to manipulate entire layers within a project. When this tool is selected, users can rotate, scale, move, and skew the entire layer as a single entity, making it highly efficient for adjusting layers without affecting individual elements within them.

In contrast, the Contour Editor tool is intended for modifying the specific shapes of vector objects, allowing for fine adjustments to the contours and segments rather than the layer as a whole. The Select tool is primarily used for selecting individual elements or groups, enabling users to work on specific parts of the design without affecting the entire layer. Lastly, the Pencil tool is designed for drawing and creating new art directly on the canvas, and it does not have functionalities related to transforming or manipulating existing layers. Thus, the Layer Transform tool stands out as the correct choice for transforming an entire layer in a storyboard.