Match the following words with their meaning. 1. demilitarized to gradually expand or intrude into a region or person's property 2. encroachment an area between two nations where no military activity is allowed 3. topography the natural geographic features of a place or region 4. arable water that is pure or clean enough to drink 5. biodiesel a type of automotive fuel that uses plant oils rather than petroleum 6. potable land that is suitable for farming
