Which is a prominent sub-region of the Hawke's Bay GI in New Zealand?

The prominent sub-region of the Hawke's Bay Geographic Indication (GI) in New Zealand is Gimblett Gravels. This area is renowned for its unique terroir, which consists of gravelly soils formed by river deposits, providing excellent drainage and warming, making it ideal for ripening high-quality grapes. Gimblett Gravels is particularly recognized for producing premium red wines, especially those made from Cabernet Sauvignon, Merlot, and Syrah.

The other options represent different wine regions around the world. McLaren Vale is a well-known wine region in Australia, renowned for its Shiraz and other varietals but does not belong to New Zealand. Marlborough is another distinguished wine region in New Zealand, famous for its Sauvignon Blanc, yet it is separate from Hawke's Bay. Paarl is located in South Africa and is known for its distinctive wine styles, again not connected to New Zealand or its sub-regions.