Correct answer: A. Textile industry
Explanation: The Spinning Jenny was an important machine of the Industrial Revolution used for spinning yarn from fibres. It allowed one worker to operate several spindles and produce thread much faster than traditional hand spinning. This increased the supply of yarn and supported the growth of mechanized textile production. The machine therefore belongs to the textile industry, especially the spinning part of cloth manufacture.
Choice A is correct because textiles include the stages of producing yarn and cloth, and the Spinning Jenny directly improved yarn production. It was not a machine for extracting iron ore, printing books, or constructing ships. Those activities also changed during industrialization, but they were not the specific purpose of this invention. Remembering the connection between spinning yarn and textile manufacturing makes the answer clear. The machine helped shift production from slower household work toward faster factory-based production.