The answer is 2. <span>The fact that mechanized agriculture has replaced manual labor. Hope this helps :)</span>
The only disadvantage I could think of would be price of equipment needed to produce energy from the source (i.e. price of solar panels)
The highland climate region of east Asia is labeled with a number (2) on the map above
Please give more information
You would have to survey the trails and roads. Basically the easiest way to get from point A to point B on an area map using existing trails.