Question

explain why the north and the south poles of a needle always align with North and South poles of Earth respectively?​

Answer 1

When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole. ... The geographic north and south poles indicate the points where the earth's rotation axis intercepts earth's surface.

Step-by-step explanation:

When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole. ... The geographic north and south poles indicate the points where the earth's rotation axis intercepts earth's surface.

Answer 2

All magnets have two poles, a north pole and a south pole, and the north pole of one magnet is attracted to the south pole of another magnet and vice-versa. So the compass needle when allowed to spin whichever way it wants, will always line itself along the north-south direction.

Hope it helps!