Concept:International trade is divided into visible trade and invisible trade.
Visible trade involves physical goods, while invisible trade involves services.
Shipping is a service, so it is an invisible trade item.
Explanation:Invisible trade includes services such as shipping, banking, insurance, tourism, and transport.
These services cannot be seen or physically recorded as they cross national borders.
Here, Nigeria is the country rendering the shipping services.
The Gambia is the country receiving those services.
In international trade, when a country receives a service from another country, it is importing that service.
Therefore, The Gambia is importing shipping services from Nigeria.
Since the shipping service is intangible, the transaction is an invisible item of trade.
Hence, The Gambia classifies this transaction as an invisible import.
Answer:A. Invisible imports