Question

for which activity would someone be least likely to use a reference map?
tracking an airlines routes across asia from tokyo
locating provinces of canada and their capital cities
mapping a route along the us interstate highway system
discovering the elevation in yosemite national park
understanding time zones observed in different countries

Explanation:

A reference map is mainly used for general locational and geographical - related information such as locations of places (like provinces and their capitals), routes (airline routes, highway routes), and time - zone information. Elevation data is more likely to be found on a topographic map rather than a reference map.

Answer:

Discovering the elevation in Yosemite National Park.