Correct option is A
The heald shaft (also called a heddle) is a part of a loom that contains a wire with an eye through which warp yarn is threaded. It controls the movement of warp threads during weaving.
Information Booster: The heald shaft plays a crucial role in weaving by raising or lowering specific warp threads to create a shed for the weft yarn to pass through, enabling patterns in fabric.
Additional Knowledge:
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Harness: The frame holding multiple heald shafts in a loom.
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Shuttle: A tool that carries weft yarn through the shed.
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Reed: Keeps warp threads spaced and helps push the weft into place.