The correct option is option 3, Declination.
Declination refers to the angle between the magnetic meridian (a line pointing towards Earth`s magnetic north) and the geographical meridian (a line pointing towards true north, determined by Earth`s rotation axis). At any given place, the magnetic north and true north may not coincide, resulting in a difference in direction. This difference is known as declination.
Option 1, Azimuth, refers to the angle between the direction of a point and the direction of a reference point, not specifically related to the magnetic or geographical meridians.
Option 2, Dip, refers to the angle between a horizontal plane and the direction of Earth`s magnetic field lines at a specific location.
Option 4, Latitude, refers to the angular distance north or south of the equator and is unrelated to the angle between the magnetic and geographical meridians.