After travelling 25 km West; then 18 km South; then 10 km East; then 7 km North, in which direction is the traveller from the starting point?

Step 1: Place the start at O(0,0); positive x means East and positive y means North. | Step 2: Combine East and West moves: the net horizontal coordinate is x = -15 km. | Step 3: Combine North and South moves: the net vertical coordinate is y = -11 km. | Step 4: Thus the final point is (-15,-11); its x-sign points West and its y-sign points South. | Step 5: Combining those two directions places the point in the South-West quadrant. | Step 6: Therefore the traveller is South-West of the starting point; distance is unnecessary because only direction is asked. | Final Answer: Option A — South-West.