501:What Invention

_______ have evolved over the centuries from the earliest models which were made from animal skins gathered up and tied around the ankles.In the 8th century BC, the Ancient Greeks wore _______ from matted animal hair for warmth. The Romans also wrapped their feet with leather or woven fabrics. By the 5th century AD, _______ called ‘puttees’ were worn by holy people in Europe to symbolise purity. By 1,000 AD, _______ became a symbol of wealth among the nobility. From the 16th century onwards, an ornamental design on the ankle or side of a _______ has been called a clock.The invention of a knitting machine in 1589 meant that _______ could be knitted six times faster than by hand. Nonetheless, knitting machines and hand knitters worked side by side until 1800.The next revolution in _______ production was the introduction of nylon in 1938. Until then _______ were commonly made from silk, cotton and wool. Nylon was the start of blending two or more yarns in the production of _______, a process that still continues.

Ans:Socks