When and where was the camel domesticated?when did it arrive in Egypt

Lefebure (1906) mentioned that camels appeared in the delta about 700 B.C. with Palestinians, and about 670 B.C. camels are said to have come into Egypt under Asarhaddan. Since it is known that the Assyrians did not normally use camels in their armies, allied Arab troops may have imported them.

Explanation:

d. they are naturallyoccuring inorganic fuels like coal and petroleum.