The correct answer is: All of the above.
Archaeological sites in Manipur provide evidence of pre-Ningthouja settlements, temples and monuments, and fortifications.
Pre-Ningthouja settlements have been found in the form of stone tools, pottery, and other artifacts. These settlements date back to the Neolithic period and provide evidence of the early inhabitants of Manipur.
Temples and monuments have been found throughout Manipur. These structures date back to the Hindu and Buddhist periods and provide evidence of the religious beliefs of the people of Manipur.
Fortifications have also been found in Manipur. These structures date back to the medieval period and provide evidence of the military history of Manipur.
The archaeological sites in Manipur are a valuable resource for understanding the history and culture of the region. They provide evidence of the early inhabitants of Manipur, their religious beliefs, and their military history.