Which of the following is NOT an aid or auxiliary to trade?

Correct option is A

Hoarding is the practice of accumulating goods in large quantities with the intention of holding onto them for future sale or to create an artificial shortage and increase prices. It is generally not considered an aid or auxiliary to trade as it does not directly facilitate the movement, storage, or financing of goods and services.
On the other hand, options (b), (c), and (d) are considered aids or auxiliaries to trade. Insurance helps to reduce the risk of financial loss due to damage or loss of goods during transportation or storage. Warehousing provides storage facilities for goods to be kept safely and conveniently until they are needed. Transportation facilitates the movement of goods and services from one place to another, thereby making them accessible to customers.