Answer:
B. scale
Step-by-step explanation:
The scale of a map is the relationship between a distance on the map and its corresponding distance on the earth's surface. It is usually expressed in the form 1: 10,000, indicating that 1 unit measured on the map represents 10,000 of those same units on the earth's surface. The 1: 100,000 scale ratio means that a unit of distance on the map represents 100,000 of those same units of distance on Earth. So on, on a 1: 100,000 scale map, one centimeter of the map equals one kilometer on the ground because 1 km is 100,000 cm. Since the range of the scale is a constant, it is valid in any of the units in which the fraction is expressed.