How do you use 'and' in a sentence?

Answer 1

• The Andes is a mountain system in western South America.
• We climbed the Andes on our holiday to South America.
• The mountain range in the west of South America is called the Andes.
  

Answer 2

we use andto refer two subject in a sentence

Example:

Answer 3

Example sentence - He wanted to be honest and admit his mistakes.

Answer 4

The Incas are known to have lived in the Andes mountains.