Concept:Contour line spacing tells us whether a slope is steep or gentle along its length.Explanation:Along line A–B, the contour lines are closer together near the upper part.This means that the slope is steeper at the top.Toward the lower part at B, the contour lines are farther apart.This shows that the slope becomes gentler or less steep downwards.Such a pattern, where the upper part is steep and the lower part is gentle, is called a convex slope.Answer:convex slope
