Law enforcement agencies are employed by the court system
The answer would be letter D. Insulated heated pipes, gravel pads, and wood piles are being used to build on top of the permafrost. Permafrost is a ground that being frozen at or below zero of water in two years or more.
A seismograph is used to measure earthquakes
Migration is the answer because they migrated from one place to another
It depends on exactly what you mean by multiple choice. How ever the definition is accompanied by several possible answers from which the candidate must try to choose the correct one.
