At its height, the byzantine empire controlled most of which of the following waterways? the atlantic ocean the black sea the dnieper river the northern sea

The Black Sea was the waterway most controlled by the Byzantine Empire during its height and most of its existence. Constantinople which is nowadays know as Istanbul was the capital city of the empire and it was located in the Bosphorus strait,  which is the connecting link between Mediterranean Sea and the Black sea.

That geographical area was a strategic point for commercial routes between Europe and Asia, and it was also military disputed due to be considered the entrance to Europe for eastern invaders.

At its height, the Byzantine Empire controlled most of the Black Sea. The capital of the empire , Constantinople, was located at the Black Sea and the Bosporus. The Bosporus connected the Black Sea and the Mediterranean Sea. The Byzantine Navy was under the rule of Justinian I, who ruled for nearly 40 years from 527 till 565,  the master in the Mediterranean Sea. Constantinople was because of the central location very popular for traders from Asia and Europe.

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the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.