How did mountains affect chinese civilizations?

China's towering mountain ranges cover two-thirds of the country, including the Himalayas, which hold the world's tallest peaks along the country's western borders. These are the highest mountains in the world. They provided a nearly impassable border for Ancient China, keeping the area isolated from many other (Western) civilisations. They were also important to Chinese religion and were considered sacred.

The figure is not necessarily a parallelogram because only one diagonal is bisected and only one pair of sides is congruent.

Plz put the answer choices thx.