GENERAL KNOWLEDGE

Detailed explanation-1: -Polar regions are characterized by extremely cold temperatures, heavy glaciation wherever there is sufficient precipitation to form permanent ice, short and still cold summers, and extreme variations in daylight hours, with twenty-four hours of daylight in summer, and complete darkness at mid-winter.

Detailed explanation-2: -Because of the cold weather it is hard for plants to grow. Frozen ground covers most of the polar regions for the majority of the year. Permafrost reaches a thickness of 600–1, 000 m (2, 000–3, 300 ft) deep. Large amounts of permafrost can lead to poor water drainage.