Answer : 2. "Hachure "
Explanation :

The disconnected lines drawn on a map for showing the slope are called (B) Hachure. Hachures are short, parallel lines that are drawn on a map to represent relief features such as slopes and hills. The spacing and orientation of hachures provide a visual indication of the steepness and direction of slopes on the map. Hachures are commonly used in cartography to enhance the representation of terrain and elevation.