Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

The Andes or Andean Mountains are the longest continental mountain range in the world , forming a continuous highland along the western edge of South America .

The Andes are a mountain range along the western coast of South America .