Correct Answer: Avalanche

Solution : The correct choice is the third option.

An avalanche refers to a sudden and rapid flow of snow, ice, and rocks down a mountainside. It typically occurs due to various factors like snow accumulation, temperature changes, or disturbances, posing a significant danger to anyone in its path.

The meanings of the other options are as follows:

• Blizzard : A severe snowstorm with strong winds and reduced visibility.
• Glacier : A large mass of ice moving slowly down a mountain or over land.
• Typhoon : A tropical storm or cyclone, especially in the western Pacific.

Therefore, the correct answer is avalanche.