CONCEPT:Elements of Earth's MAGNETIC Field:The magnitude and direction of the magnetic field of the earth at a place are completely given by certain quantities KNOWN as magnetic elements.Magnetic Declination (θ):It is the angle between geographic and magnetic meridian planes. Declination at a place is expressed at θ° E or θ° W depending UPON whether the north pole of the compass NEEDLE lies to the east or the west of the geographical axis.The angle of inclination or Dip (Φ):It is the angle between the direction of the intensity of the total magnetic field of earth and a horizontal line in the magnetic meridian. EXPLANATION:The magnetic inclination or Angle of dip is one of the techniques used to measure the polarity of the earth’s magnetic field.And the amount of horizontal component varies as we move from latitude and longitude thus option 2, 3 and 4 are correctHence option 1 is the only incorrect among all