Complex sentence: The massif contains a very rich variety of biodiversity as a result of the huge height range from the valleys to the highest summits, with mild temperatures at altitudes between and, whereas arctic conditions occur from up to the highest point at.
Split into simpler sentences: The massif contains a very rich variety of biodiversity as a result of the huge height range from the valleys to the highest summits. Mild temperatures occur at altitudes between and, whereas arctic conditions occur from up to the highest point at.