This is the matching of the descriptions: B) Shrine of Naikū: One of the two primary shrines within the Ise Grand Shrine complex, alongside Gekū.
D) Shikinen Sengu Ritual: The replacement ritual performed every 20 years at the Ise Grand Shrine, involving the rebuilding of shrine structures. The last Shikinen Sengu took place in 2013.
A) Ise Jingū Complex: The extensive and sacred complex encompassing forests, a river, a bridge, and approximately 125 shrines, including Naikū and Gekū.
C) Emperor Tenmu's Temple: Emperor Tenmu initiated the establishment of the Ise Grand Shrine in 690 C.E., but the term "Emperor Tenmu's Temple" is not directly associated with the shrine complex itself.