Explanation

The United States is a federal democratic republic, where leaders are elected by the people, and power is derived from the citizens through free and fair elections.

It operates under a constitution that guarantees fundamental rights, separation of powers (executive, legislative, judicial), and regular elections — all defining traits of a democracy.

Explanation

Barack Obama was 44th President of USA from 2009 to 2017.

Barack Obama win the Nobel Peace Prize in 2009.

Reason of Noble Prize: "for his extraordinary efforts to strengthen international diplomacy and cooperation between peoples."

Explanation

The headquarters of IBM (International Business Machines Corporation) is in Armonk, New York, USA.

It serves as the company’s global center for management and operations.

Explanation

In May 2022, Frontier Supercomputer of USA beat Japan`s Fugaku to become world fastest supercomputer.

Explanation

Woodrow Wilson is the President during World War I

 He served as the 28th president of the United States from 1913 to 1921.

World War I was a global war originating in Europe 

that lasted from 28 July 1914 to 11 November 1918.

Additional information:

During World War II, two atomic bombs over the Japanese cities 

• First Bomb, the Little Boy type of bomb was dropped in Hiroshima on 6 August 1945 
• Second bomb, the Fat Man type of bomb was dropped on Nagasaki on August 9, 1945

The Second World War was a global war

That started in 1939 and ended in 1945