Construction for a new Trump-backed ballroom is taking place in which part of the White House?

The correct answer highlights that the construction of a new Trump-backed ballroom is taking place in the East Wing of the White House. The East Wing serves various purposes, including housing the offices of the First Lady and supporting staff. Unlike the West Wing, which is primarily designated for the president's inner circle and administrative activities, the East Wing has more flexible spaces that can accommodate events and gatherings.

The other options are significant areas of the White House but have different uses. The West Wing is dedicated to the executive functions of the presidency, while the South Lawn and North Portico areas are primarily external spaces that are often used for ceremonial purposes, such as welcoming visitors. The choice of the East Wing for such construction aligns with its functional design, making it suitable for hosting events like a ballroom.