The correct answer is option 2: New York. "Ground Zero" refers to the site of the former World Trade Center towers in New York City, which were tragically destroyed during the terrorist attacks on September 11, 2001. After the attacks, the term "Ground Zero" became synonymous with this location, which was the epicenter of the devastation. It has since been transformed into a memorial and museum known as the National September 11 Memorial & Museum. Option 1, Greenwich, is a neighborhood in London and is not related to Ground Zero. Option 3, Indira Point, is the southernmost point in India and is also unrelated. Option 4, Shriharikota, is a barrier island in India that is home to the Satish Dhawan Space Centre, but it is not associated with Ground Zero.