Final answer:
True, Borobudur is built on a natural hill and terraced with layers of stone, signifying the power of the Shailendra Kings and Buddhism's impact in central Java.
Step-by-step explanation:
The statement that Borobudur is built on a natural hill is true. While the natural hill provides a foundation, the effect of a terraced mountain was indeed created by adding layers of stone. This process was a monumental feat, implying a significant devotion to Buddhism by the ruling Shailendra Kings during 775-860 CE in central Java, Indonesia.
The structure rises over one hundred feet above the ground, demonstrating the immense power of the rulers over land and labor. Borobudur is decorated with over 2,600 relief panels and houses seventy-two perforated stupas around a central dome, making it the world's largest Buddhist monument, as well as a significant religious and commercial hub for the ancient world.