The correct answer is Option 2: Motupalli.

Motupalli was an important seaport in the Kakatiya kingdom, which was located on the east coast of India. It was a thriving port city during the reign of the Kakatiya dynasty, which ruled from the 12th to the 14th century.

The Kakatiya kingdom was known for its maritime trade, and Motupalli was one of its key ports. It was strategically located at the mouth of the Krishna river, which made it an important center for trade and commerce. The port was also known for its shipbuilding industry, and it was the main center for building the traditional Indian ocean-going vessel, the `Kakatiya kattari`.

Motupalli was a major hub for the export of textiles, spices, and other goods from the inland regions of the kingdom to various parts of Southeast Asia, China, and the Middle East. The port also played a crucial role in the import of luxury items, such as pearls, precious stones, and silk, which were highly valued in the Kakatiya court.

Motupalli`s importance as a seaport declined after the fall of the Kakatiya kingdom in the 14th century. However, it continued to be a significant center for maritime trade during the Vijayanagara and Golconda periods.

In conclusion, Motupalli was a very important seaport in the Kakatiya kingdom, and it played a crucial role in the kingdom`s maritime trade and commerce. Its strategic location, shipbuilding industry, and trade links made it a vital center for the exchange of goods and ideas between India and other parts of the world.