<span>It facilitate long distance travel and transport of bulky goods which are not easily transported through motor vehicles.
</span><span>It helps in the industrialization process of a country by easy transportation of coal and raw-materials at a cheaper rate.
</span>Quick movement of goods from one place to other place.
The production of crops and farm animals for sale, usually with the use of modern technology: commercial farming methods.
The Khmer's came from Cambodia.
Answer:
mountains / mountain ranges.