Synchronous modeling workflows can be utilized to modify models that consist of?

Synchronous modeling is a powerful design approach that allows for greater flexibility in editing and modifying models. The strength of synchronous modeling lies in its ability to handle mixed types of designs efficiently. This means it can work with both parametric features—those that rely on specific parameters to define their shape and size—and non-parametric or direct features, which do not depend on such parameters.

Utilizing synchronous modeling workflows, designers can easily make adjustments to various elements within a design, whether they are basic shapes, complex features, or intricate assemblies. This versatility is essential in modern design environments, where multiple design methodologies may be combined within a single project.

While the other choices suggest limitations to the applicability of synchronous modeling—like only working with base features, complex assemblies, or strictly parametric features—these interpretations fail to recognize the full potential of synchronous modeling. Its ability to integrate and modify various design types makes it suitable for a wider range of applications, thus reinforcing why mixed types of designs is the correct choice.