What is a highland? (A) An area of high or hilly land (B) A piece of land surrounded by water on three sides (C) A large area of land made up of one type of landform (D) A raised, flat-surfaced area bound on one or more sides by cliffs Also, I don't think this is a Physics question, it is just 6th-grade science.

Answer: Option A

Explanation:

A highland, as the name implies, is an extension of mountainous land.

So a highland is any region that is "elevated" compared with the surrounding region.

With this definition, the correct option is A: An area of high or hilly land (obviously, high or hilly compared with the surrounding area)

A

Explanation:

A Highland is an area of mountains.