A person walks 60.0 m and then be walks 130 m. (1, 4) a) What is the person's displacement if they walk east then westm west) b) What is the person's displacement if he walks east both times? (190 m ) c) What distance does the person walk in each case? (190m)

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.