Final answer:
The location where Sardar Baghel Singh stationed his troops is known as Tees Hazari. For the Indus Valley question, the ceremonial center in these ancient cities was likely a citadel, serving as an administrative or ritual site.
Step-by-step explanation:
The place in Delhi where Sardar Baghel Singh stationed 30,000 of his troops is known as Tees Hazari. This historical event is rooted in the period when Sardar Baghel Singh and his Sikh army arrived in Delhi in 1783. Through his leadership, the Sikhs successfully negotiated the right to establish gurudwaras at the sites connected with Sikh Gurus, and Tees Hazari, which translates to "Court of the Thirty thousand", marks the site where his troops were strategically stationed during this time.
For the student's original question regarding the Indus Valley Civilization, the monumental ceremonial center in Indus valley cities was likely a citadel. The Indus Valley cities such as Harappa and Mohenjo-daro, were well-planned and featured distinct elevated areas known as citadels. These raised areas served administrative or ritual purposes and were designed to be separate from the residential zones as a means of protection and a symbol of power or religious significance.