How many meters of elevation are there
between contour lines on the topographic map?

elevation lines at 0,10,20,30,40 and so on different maps use different intervals depending on the topography, every 10 feet is 3 meters i hope this helped :)

Explanation: If your map uses a 10 foot contour interval you will see contour lines for every 10 feet

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.

d.)   when the us left nato after the end of the cold war and they had to evolve to focus on more humanitarian measures with the smaller budget