Answer: a common language, history, or place of orgin.
Explanation:
A mountain is a single standing one such a Mount Fuji. A mountain range is a chain of mountains such as the Himalayas
In fact, since the Moon is constantly rotating on it's own axis, there is no area of the planetoid which is permanent darkness, and the far side of the Moon is only completely devoid of sunlight during a Full Moon - when the Sun is facing the Moon with the Earth in between.
