Explanation

The Andes the largest mountain range in the world.

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Andes mountain ranges are the longest mountain ranges in the world.

The Andes's length is 8,900 km (5,500 mi)

It is also known for its volcanoes.

Highest point: Aconcagua

Second Highest 

K2 is the world’s second-highest peak  8,611 meters

Mount Everest first highest mountain in the world

Smallest  Mountain Range

The Sutter Buttes are the smallest mountain range in the world.

Location: Sutter County, California,  United States.