The spinning jenny, invented by James Hargreaves in the 18th century, was a multi-spindle spinning frame that revolutionized the production of yarn, greatly speeding up cloth making.
Step 1: Importance
It allowed one worker to spin multiple threads at once, boosting textile manufacturing efficiency.
Step 2: Industrial Revolution context
This invention was a key driver in the early Industrial Revolution, shifting production from manual to machine-based.
Therefore, option (B) is correct.