The is a chain of continuous mountain ranges lining the western half
of North and South America

Andes

Explanation:

The Andes, running along South America's western side, is among the world's longest mountain ranges. Its varied terrain encompasses glaciers, volcanoes, grassland, desert, lakes and forest. The mountains shelter pre-Columbian archaeological sites and wildlife including chinchillas and condors. From Venezuela in the north, the range passes through Colombia, Ecuador, Peru, Bolivia, Argentina and Chile.

The American Cordillera

Explanation:

The American Cordillera is a chain of mountain ranges (cordilleras) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of North America, South America and Central America. It is also the backbone of the volcanic arc that forms the eastern half of the Pacific Ring of Fire.

the density would be a smaller number.

the correct answer is c.