What is the highest mountain range in the British Isles?

What is the longest mountain range in South America? Which mountain range is home to the highest peak in North America? Which mountain range runs through the middle of New Zealand's South Island? Which mountain range runs along the border between Pakistan and Afghanistan? Which mountain range runs through the middle of the Italian peninsula? Which mountain range is home to the highest peak in Eastern Europe? What is the longest mountain range in North America? What is the longest mountain range in Antarctica?