The correct answer is option 4, Shah Jahan. Shah Jahan was the Mughal ruler who transferred the capital of the Mughal empire from Agra to Delhi permanently. Agra had been the seat of power for the previous Mughal rulers, but Shah Jahan decided to establish a new capital in Delhi. He built the majestic Red Fort and the famous Jama Masjid in Delhi. The transfer of the capital to Delhi represented a shift in the political and cultural center of the empire. It also allowed for better administration and control over the territories in the north. Shah Jahan`s reign is often regarded as the golden age of Mughal architecture and art, with landmark constructions such as the Taj Mahal, which he built in memory of his wife Mumtaz Mahal.