Why should a bus driver do a walk-through of the vehicle before departure, checking under seats and in overhead areas?

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1. To confirm no items, passengers, or hazards were left behind or are out of place before pulling away
2. It is required only on vehicles carrying fewer than ten passengers
3. Walk-throughs are purely a courtesy with no safety purpose
4. This check is required only at the very end of a shift, never before departure, since items left behind are easier to spot once the vehicle is empty

Correct!

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