The correct answer is option 2, Geneva. The headquarters of the World Meteorological Organization (WMO) is located in Geneva, Switzerland. The WMO is a specialized agency of the United Nations and is responsible for promoting international cooperation in meteorology, climatology, hydrology, and related fields.
Option 1, Washington, is incorrect. While Washington, D.C. is the capital city of the United States and is home to various international organizations, it is not where the WMO headquarters is located.
Option 3, Moscow, is also incorrect. Moscow is the capital city of Russia and is not where the WMO headquarters is based.
Option 4, London, is also incorrect. London is the capital city of the United Kingdom and is not where the WMO headquarters is situated.
In conclusion, the correct headquarters of the World Meteorological Organization is located in Geneva, Switzerland.