Which command allows parts to be positioned by creating relationships between components in an assembly?

The Assemble command is fundamental in Solid Edge for positioning parts within an assembly by establishing relationships between different components. When you use the Assemble command, it allows you to define specific geometric or positional relationships such as coincident, distance, or angle between the selected components. This is essential for accurately creating assemblies, ensuring that parts fit together as intended and function correctly in various mechanical systems.

This command effectively facilitates the assembly process by enabling the user to control how parts interact with each other, which is crucial for designing complex systems where precise movements and locations of components are necessary. In contrast, other commands like Attach, Align, or Join serve different purposes, such as modifying existing geometries or simply connecting items without the same level of profound relational detail needed for proper assembly setups. Therefore, the Assemble command is the correct choice for establishing essential positional relationships between components in an assembly.