Challenge 3: Why Trimming in Audacity Skips Fairlight's Ripple/Roll/Slip Decisions — Solution Walkthrough

The answer:

Fairlight's Ripple, Roll, and Slip trim types (from Video Editing
Fundamentals' own Chapter 4) each exist to answer a specific question:
what happens to the rest of the timeline, and to the video picture
sitting alongside it, once a trim is made. Those are genuinely
different possible outcomes precisely because a video timeline has
multiple synchronized tracks that a trim could knock out of alignment.

Why Audacity doesn't need that same decision:

There's no video picture running underneath an Audacity project at
all. When a selected range — a pause, a cough, a false start — is
deleted, the gap simply closes, because there's nothing else that
trim needs to stay synchronized with. The three-way Ripple/Roll/Slip
choice only exists to manage a synchronization problem, and that
problem doesn't apply here.

Why this is simpler, not incomplete:

This isn't Audacity missing a feature Fairlight has — it's a natural
consequence of Audacity's own audio-only, waveform-based scope, laid
out back in Chapter 1. A tool with no video timeline has no reason to
offer video-timeline trim types.

WHY THIS WORKS AS AN ANSWER
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This exercise checks that Audacity's simpler trimming model is
correctly understood as a consequence of having no video picture to
stay in sync with, not a stripped-down or incomplete version of
Fairlight's own trim tools.