What is the shortcut to select the Brush tool in Photoshop?

The shortcut to select the Brush tool in Photoshop is the letter B. This single-letter shortcut allows users to quickly and efficiently choose the Brush tool without navigating through the menu, streamlining the workflow significantly, especially during creative tasks where speed and ease of access are essential.

The other options don't serve the same purpose effectively. "Brush" is simply the name of the tool and is not a shortcut. "Shift+B" would toggle between the Brush tool and brushes like the Pencil tool, making it less direct for selecting the Brush tool specifically. "Ctrl+B" is actually associated with a different function, primarily related to color adjustments, thus not relevant for selecting tools within the application. Using the single letter shortcut is the optimal method for quickly accessing the Brush tool.