Which portion of an extension ladder moves to extend its length?

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Multiple Choice

Which portion of an extension ladder moves to extend its length?

Explanation:
Extending an extension ladder works by sliding a section out to add length. The part that actually moves to extend is the upper section, which slides up and out from the base as you raise the ladder. The base section stays on the ground to provide stability, while the rungs are fixed between the rails and don’t move to extend. The halyard is the rope or cord used to raise and lock the upper section in place; it enables the extension but isn’t the moving portion itself.

Extending an extension ladder works by sliding a section out to add length. The part that actually moves to extend is the upper section, which slides up and out from the base as you raise the ladder. The base section stays on the ground to provide stability, while the rungs are fixed between the rails and don’t move to extend. The halyard is the rope or cord used to raise and lock the upper section in place; it enables the extension but isn’t the moving portion itself.

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