Answer:
The stream will flow fastest between 2 and 3.
Explanation:
On this map, we can see two basic elements, one being the contour lines, and the other being the color with which a stream is presented. The contour lines are giving us a good representation of the relief and where it is steeper and where it is less steep. Basically, where the contour lines are closer to each other, we have a steeper relief, and when the contour lines are further away, the relief is less steep.
The water moves under the influence of gravity, so downward. Where the steepness is the greatest, the gravity influences it the most, so it moves faster, while where the steepness is smaller, the gravity influences it less, so it moves slower. On this map, the contour lines are closest to each other between points 2 and 3, meaning it is the steepest part of the relief, and it is the place where the stream flows the fastest.
In the case of high evaporation rates, the local government can manage water supply by scheduling a rotating water outage. The outage can be set to the hours when the evaporation rate is the highest. This will allow the citizens to save up water and use it wisely.
Try https://www.sciencedaily.com/terms/water_pollution.htm or https://www.britannica.com/science/water-pollution
