Answer:
The magnetic declination is defined as the difference between the north geographic pole and the north magnetic pole.
A map can help to correct magnetic declination and can show the correct way in the compass. We have to maintain the declination on our compass in a way that it's orienting arrow points towards 10 degrees east. next we have to set our compass at zero degrees. Now we need to try to adjust or turn our body or compass in one motion so that the red magnet needle overlap the orienting arrow by following the the direction-of-travel arrow pointed away from us.