Question

why did the red cap worn by Sans culottos in France symbolise​

Answer 1

Red Cap was worn by Sans Culottes in France as an image of Liberty.

It's otherwise called the "Cap of Liberty" is seen on the flag of Paraguay, Santa Catarina, and a few others.

The freedom cap goes back in any event to Roman circumstances. A liberated slave wore it amid the function of his manumission, and on exceptional events a short time later. Substantially later, it came to figure intensely in French Revolutionary iconography