Cách sử dụng
A foothill is a small hill at the base of a larger mountain or hill. It is usually close to the bottom of a mountain range. People use the word 'foothill' to describe the hill that is at the bottom of a larger mountain or hill. For example, if you travel to the Rocky Mountains, you will see many foothills. They are important because they help to support the larger mountains and provide a habitat for plants and animals to live.