In Bottom-up modeling, you create component parts at which level?

In Bottom-up modeling, the component parts are created at the assembly level. This modeling approach begins with the individual components or parts and progresses to assemble them into a complete system or assembly. The focus is on designing each part in detail, ensuring that all features are well-defined before they are brought together.

This method allows for a high level of control over each component's design, as it emphasizes the development and validation of smaller parts before integrating them into a larger assembly. The assembly level is where the final product is visualized and put together, showcasing how each part interacts with others in the overall design. Therefore, the correct approach in Bottom-up modeling aligns with creating these component parts specifically at the assembly level, where the integration and relationship between parts are clearly defined and tested.