Explanation:

Recently, the U.S. is pulling out four of its powerful Patriot missile systems from Saudi Arabia.The move comes after determining that the threat from Iran that sparked an arms buildup in the region had waned.

Patriot (MIM-104) is a long-range, all-altitude, all-weather air defence system to counter tactical ballistic missiles, cruise missiles and advanced aircraft. It has been developed by the U.S. Hencce option 1st is correct.