B. protection because all kings have knights to protect them and the kingdom.
The answer is Irrigation
Before irrigation's technology developed, humans could only rely on Rain to maintain their Agricultural Water supply.
But as human intellectual developed , we finally able to adapt and created a modern watering system that helped to fulfill our Farm's water supply to survive in a dry Climate
From almost the beginning there were two competing parties<span>–the </span>Federalists<span> of Washington, Hamilton and Adams and the </span>Democratic-Republicans<span> of ... Thereafter, the </span>Whig Party<span>, which had failed to take a strong stand on the matter of </span>slavery<span>, faded from the </span>political<span> scene and was replaced by the</span>Republican Party<span> </span>
It’s a Babylonian code of law in the ancient Mesopotamia :-)