Final answer:
Salt was considered as valuable as gold in ancient times due to its scarcity and importance in food preservation. African civilizations and the Romans both traded salt for gold, emphasizing its high worth. The saying 'salt was worth its weight in gold' highlights its value as a precious commodity.
Step-by-step explanation:
In ancient times, salt was considered as valuable as gold. African civilizations would often trade salt for gold and other goods. The Romans even used salt as a form of payment and the word 'salt' is derived from the term 'salary'. This is where the saying 'salt was worth its weight in gold' comes from.
One example of this saying's origin is the trade of salt for gold in African civilizations. Salt was highly prized and used for various purposes, including food preservation. The scarcity and demand for salt led to its high value. Another example is the Romans' use of salt as a form of payment. This further strengthens the association of salt with its high worth.
Salt was essential in ancient societies for preserving food. It was used to prevent spoilage and preserve food for longer periods, especially in regions where there were no other means of refrigeration. The significance of salt's role in food preservation made it a valuable and sought-after commodity, hence the saying that 'salt was worth its weight in gold'.