The type of machine that uses a needle that goes from side to side is a/an a. offset machine. b. zigzag machine. c. straight-stitch machine. d. chain-stitch machine.

The answer would be letter B. A zigzag is alternative geometry of the lockstitch. It is an alternating stitch where a straight stitch will not satisfy, like in building up buttonholes, in mending fabrics, and in temporary putting together two work pieces.

The term is called adduction 

Answerbecause he hoped the chair would later be mass- produced not hand -crafted;