<span>A barter system is an old method of exchange. Th is system has been used for centuries and long before money was invented. People exchanged services and goods for other services and goods in return. ... The value of bartering items can be negotiated with the other party.</span>
Answer: Amendment
Explanation: It is a modification of the constitution of a state, resulting in occasional changes in the constitutional text, which are restricted to certain matters, and can not only have as its object the abolition of the so-called stone clauses.
