I only know 11 which is Islam
As the crow flys is the straight line distance from point to point. Use a ruler to measure or a piece of string to match the scale under the map.
By road is the distance following the curved road drawn On the map. Lay a string along the path and then match it to the scale under the map.
Ecosystem: A biological community of interacting organisms and their physical movement
It is important to know where erosion is occurring as we can draft the most efficient solutions based on the environment (climate, surroundings etc.) of the place.
Hope this helps!
