Final answer:
The primary innovation that revolutionized fabric production in Britain during the Industrial Revolution was the Spinning Jenny.
Step-by-step explanation:
The primary innovation that revolutionized fabric production in Britain during the Industrial Revolution was the Spinning Jenny. Invented by James Hargreaves in 1764, the Spinning Jenny allowed one person to spin multiple threads at the same time. This enabled the production of more yarn, leading to increased efficiency and greater quantities of fabric.
Learn more about Industrial Revolution and fabric production