In which Basque province is the Urdaibai Biosphere Reserve situated?

Answer and explanation

Correct answer: D. Biscay

  1. Step 1: According to the official source: The Urdaibai estuary is a natural region and a Biosphere Reserve of Biscay, Basque Country, Spain . Answer: Biscay. Why not the others: Navarre, Álava, and Gipuzkoa are other Spanish provinces situated in different administrative regions.

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