Which body of water contributed most to the spread of the ottoman empire?

Mediterranean sea.

Explanation:

Ottoman empire was one of the longest-ruling empire that ruled for almost 600 years in the world's history. The Ottoman Empire was established by Osman I in 1299.

The empire ruled most parts of North Africa, the Middle East, and Eastern Europe. The empire was at its zenith under the reign of Suleiman also known as the Magnificent.

The water body the most contributed to the spread of the Ottoman empire was the Mediterranean Sea as it is the largest water body that connects the three continents, Europe on the north, Asia on the east, and Africa on the south.

So, the correct answer is the Mediterranean Sea.

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