Terraces are flat areas of land on the slope of a mountain that are utilized for farming. Vertical trade is used to get crops that are not grown in their location, such as bananas, oranges, and tomatoes. Tierra Helada is a very cold and frosty location. This inhibits some crops from growing, resulting in a scarcity of crops. Humans move these crops up the mountain where they can be harvested even though it's not their natural environment. Tierra Firme is a fertile area at the bottom of a valley. It is known for its production of potatoes and onions. These crops can only grow in certain soil types so they are moved around by humans when they need to be planted out. Potato farms are found in Terra Firma while onion fields can be seen in Terra Fluida. In conclusion, terraces are areas of land on the side of a mountain that are used for farming. They are usually between 100-500 feet high and vary in size depending on how much food needs to be produced for a population. The Andes mountains create useful conditions for growing crops due to their altitude and climate. However, this also makes them vulnerable because if there is a problem with the transportation system or an earthquake then many people could go hungry.