What causes the mountain features on the moon?

The mountain features on the Moon, known as lunar mountains, are primarily caused by the impact of asteroids and comets during the Moon's formation and early history. These collisions created massive craters, and the subsequent geological processes, including volcanic activity and tectonic movements, contributed to the elevation and formation of mountain ranges. Additionally, the Moon's lack of atmosphere and weathering processes means that these features have remained relatively unchanged over billions of years.