Concept:The angle between the true north and magnetic north directions is the magnetic declination.Explanation:True north points toward the geographic North Pole.Magnetic north is the direction shown by a magnetic compass needle.These two directions are usually not the same at a place.The angular difference between them is called magnetic declination.This angle is measured in degrees east or west of true north.So, the correct term for this angle of difference is magnetic declination.Answer:A. magnetic declination