Challenge 3: A Deck With a Unique Effect on Every Element — Solution Walkthrough

What's specifically wrong:

Every animation and transition in this deck is decorative rather than
purposeful — none of the varied entrance effects (flying, spinning,
bouncing) or the differing transition styles between slide pairs
serve any actual explanatory purpose connected to the content itself.
Instead, the constant variety of motion competes directly for the
audience's attention against the actual substance of each slide,
forcing viewers to process a stream of unrelated visual effects at
the same time they're supposed to be listening to and absorbing the
presenter's actual points.

The underlying principle shared with Chapter 9:

This is the exact same core problem Chapter 9 identified with "Death
by Bullet Points" — too much of ANYTHING competing for attention
(dense text there, constant varied motion here) measurably reduces
how much the audience actually retains, regardless of how impressive
or engaging any single element might look in isolation. Chapter 9's
fix for text density was restraint and a clear visual hierarchy;
this chapter's fix for motion is the identical kind of restraint —
one simple, consistent entrance effect (or none) and one consistent
transition style, reserving anything more elaborate for the rare case
where the motion itself is genuinely part of the explanation (a
progressive bullet reveal, a chart building up piece by piece to
match what's being said).

WHY THIS WORKS AS AN ANSWER
------------------------------
Recognising that Chapters 9 and 10 are really the same underlying
lesson — restraint, and asking "does this serve the audience or just
fill space and look busy" — applied to two different aspects of a
slide (text and motion) is the actual takeaway this exercise is
testing, not just "20 different animations is a lot."