Which of the following cities is both a harbour and a capital?

The city that is both a harbor and a capital is Abidjan. A harbor is a place where ships can dock and unload their goods, while a capital is the main city or town that serves as the administrative center of a country. Abidjan is the largest city in Côte d'Ivoire, a country located in West Africa. It is situated on the southern coast of the country and has a large natural harbor. This harbor has made Abidjan a major center for trade and commerce in the region. In addition, Abidjan is also the capital of Côte d'Ivoire, making it the only city among the options provided that is both a harbor and a capital. In summary, Abidjan is the city that is both a harbor and a capital, due to its large natural harbor and status as the administrative center of Côte d'Ivoire.