2. which mountain range is farthest south?

Andes Mountain  is the mountain range is farthest south.

Explanation:

The Andes is the longest continental mountainous region in the world and forms a persistent mountain range across South America's outskirts. The Andes also have just behind Himalayas the second highest elevation in any mountain range.   It stretches from north to south 4,500 miles (7,200 km) across the continent's west side. The highest volcanic eruptions in the world are in the Andes, like Ojos Del Salado, that rises to 6.893 m (22.615 ft.) on the border of Chile and Argentina. The folding and pushing belt is smaller in the east than the farther south but it is well-defined by some patterns in the northwest and mountains.