What is the process to create a custom brush in Illustrator?

Creating a custom brush in Adobe Illustrator involves selecting existing artwork that you want to convert into a brush, and then accessing the Brushes panel to create a new brush from that selection. When you select the artwork and choose the option within the Brushes panel, Illustrator will allow you to define various properties for the new brush, such as its type (e.g., scatter, art, pattern, or calligraphic), and customize how it behaves when applied to paths.

This process enables you to leverage the artwork you've created, transforming it into a reusable brush that maintains the quality and characteristics of the original design, making your workflow more efficient and artistic work more cohesive.

The incorrect options involve methods that do not directly lead to creating a custom brush from existing artwork, such as choosing options that are not available or relevant in the Brush creation workflow.