Which map feature best indicates whether two regions have the same elevation?

contour lines

Explanation:

Contour lines is a map feature which help to indicate region of equal height in a map.

In a map, contour lines are usually drawn in irregular circles repeatedly, until the elevations of the region are fully represented.

The inner part of the contour lines usually denote high elevation while the outter contour lines usually denote lower elevation.

Therefore the map feature that best indicates whether two regions have the same elevation is contour lines.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.