Which of the following is not an aid to trade ?

Aids to trade are the services that support the smooth buying and selling of goods, removing obstacles such as distance, risk, time, and the need for finance. Insurance removes the obstacle of risk by compensating for loss or damage. Banking removes the obstacle of finance by providing loans, safekeeping of money, and payment services. Transport removes the obstacle of distance by moving goods from where they are made to where they are needed.

Production is not an aid to trade because it is the actual creation of goods and services, which is the activity that trade supports, not a service that assists trade itself. Trade begins after goods have been produced; production is a separate economic activity from the commercial services that help move and exchange those goods.

Examination reminder: aids to trade always solve a specific obstacle to buying and selling (finance, risk, distance, storage, communication); production creates the goods being traded, so it stands outside that list.