Which option allows the sketch edge to be created at the angle of the y-axis?

Creating a sketch edge at an angle to the y-axis is accomplished by using a vertical alignment since the y-axis is oriented vertically in a standard Cartesian plane. When a sketch edge is set to be vertical, it runs parallel to the y-axis, ensuring that any line created in this orientation will align directly with the vertical axis of the design space. This is crucial in drafting and modeling as it allows for precise control over the geometry relative to defined axes, ensuring that components are accurately positioned.

The other options do not align with the requirement to create a sketch edge specifically at the angle of the y-axis. Horizontal aligns along the x-axis, diagonal would create an edge at some angle between the horizontal and vertical axes, and orthogonal implies a relationship of right angles, which does not inherently create a vertical edge by itself. Understanding these alignments allows designers to control their sketch geometry more effectively within Solid Edge.