Can someone please help me on this one thank you

What is a cordon and where is it found

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m

Which type of landforms forms at the plate boundary as a result of divergent stress