Which of the following tools allows for flexible editing in Logic Pro?

The Flex tool is specifically designed to allow for flexible editing in Logic Pro. It provides the ability to manipulate audio in a way that is intuitive and efficient, enabling users to stretch, compress, and adjust the timing of audio regions without affecting their pitch. This functionality is essential when working with audio tracks that need to fit perfectly with other elements in a project, as it allows for precise timing adjustments and edits in a non-destructive manner.

The other tools mentioned serve different purposes:

• The Marquee tool is primarily used for selecting specific sections of audio or MIDI regions for copying, moving, or deleting, which does not inherently provide flexibility in editing.
• The Pencil tool is utilized to add or edit MIDI notes, enabling users to create new notes or modify existing ones in the MIDI editor, rather than adjusting existing audio tracks.
• The Zoom tool focuses on navigating the project timeline, allowing for closer inspection or adjustments but not directly altering or editing audio data.

Thus, the Flex tool uniquely empowers users with the capability for real-time adjustments, making it the optimal choice for flexible editing within Logic Pro.