GENERAL KNOWLEDGE

Detailed explanation-1: -A glacier is a huge mass of ice that moves slowly over land. The term “glacier” comes from the French word glace (glah-SAY), which means ice. Glaciers are often called “rivers of ice.” Glaciers fall into two groups: alpine glaciers and ice sheets.

Detailed explanation-2: -The moving ice mass downslope under the impact of gravity is called a glacier.

Detailed explanation-3: -The correct answer is option 3, i.e. Avalanche. When a mass of snow moving rapidly down a slope of a mountain is known as Avalanche.

Detailed explanation-4: -A glacier is a huge mass of ice which moves very slowly, often down a mountain.