1:600,000 and 1:2,000,000 refer to map scales. These ratios indicate the relationship between a distance on the map and the actual distance on the ground. In this context, the scales show how much the land area has been reduced in size for representation on the map.
- A scale of 1:600,000 means that 1 unit of measurement on the map represents 600,000 of the same units in reality.
- A scale of 1:2,000,000 means that 1 unit on the map represents 2,000,000 of the same units in reality.
Therefore, the correct answer would be the map scale.