Final answer:
The vertical element that tops a stupa is called a Chatra, symbolizing protection and enlightenment.
Step-by-step explanation:
Chatra was the “headquarters” of Ramgarh district in the 18th-19th century. The renowned reformer, Raja Rammohan Roy, was sheristadar in Ramgarh district, in 1804–05, and used to function from both Ramgarh and Chatra. Subsequently, Ramgarh district became part of North-western Frontier Agency and Hazaribagh district came up. Chatra became a subdivision of Hazaribagh district in 1914. It became a full-fledged district in 1991
The term that best describes the vertical element that tops a stupa is a. Chatra. A chatra is an umbrella-like structure symbolizing the sacred tree under which Buddha gained enlightenment and protection in the spiritual sense. It usually crowns the harmika, a square fence-like enclosure that represents the world mountain and houses the relic chamber of the stupa.