Challenge 2: Wheels That Move With the Car Body but Can Still Spin Independently — Solution Walkthrough

The answer:

Per this chapter's own material, parenting each wheel to the car body
solves this directly. Parenting links a child object (each wheel) to a
parent (the car body), so moving, rotating, or scaling the parent
automatically carries the child along with it — exactly the
"move together" requirement described here.

Why this doesn't prevent the wheels from spinning independently:

Per this chapter's own material, a parented child can still be
transformed independently on its own, on top of whatever the parent
is doing. Each wheel can still be rotated individually to simulate
spinning, entirely separate from however the car body itself is
currently being moved or rotated as a whole.

Why parenting fits this scenario specifically:

This chapter's own car-and-wheel example is exactly this situation —
a wheel parented to a car body moves along with the car automatically
without needing to be separately repositioned every time the car
moves, while still allowing that same wheel its own independent
rotation.

WHY THIS WORKS AS AN ANSWER
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This exercise checks that a "move together, but still independently
adjustable" requirement is correctly matched to parenting, rather than
a destructive combination or manual repositioning.