What is a contour interval?

a. a loop formed by contour lines that indicates a peak or depression

b. the elevation difference between two adjacent contour lines

c. an imaginary line that joins points of equal elevation

d. the degree of a slope's steepness

B. The elevation difference between two adjacent contour lines

Explanation:

A contour interval is the vertical distance or difference in elevation between contour lines in topographical maps. A topographical map is a type of map that specifies in the large detail and quantitative representation of relief, usually using contour lines, contour intervals and many other methods.  

hello!

according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

hope this

after the french-indian war.