The root of which plant, native to South America, is (in various forms) emetic, diaphoretic and expectorant, a stimulant to the stomach, intestines and liver, and a restorative?
Which is the plant, a member of the Amaranth family, native to the Andes in South America, the seeds of which are a staple food crop in parts of South America and are now grown around the world?
The dried and grated root of which plant is baked to make cassava bread, and is used to make a beverage called piwarry from its fermented juices?
Which railway has the highest line in South America and the second highest in the world, second only to the one which connects Qinghai in China and Lhasa in Tibet?
