How do highland climates differ from polar climates? Highland climates have long summers. Highland climates are localized. Highland climates receive little snow. Highland climates are treeless.

The correct answer should be - highland climates are localized.

This means that highland climates are restricted only to a particular area, that where highlands can be found, whereas polar climates are in various parts of the world. Other options are incorrect, which means that there is only one correct answer.