How does a compass needle respond when a compass is placed within a magnetic field?

It point outs  the magnetic poles of the magnetic field by aligning itself

Explanation:

The needle of the compass is a small magnet with a north and south magnetic poles. Now when compass is placed in a magnetic field , its needle will try to align itself in a way such that magnetic poles of the needle points the respective opposite pole of the magnetic field.

Therefore , the alignment of magnetic needle of compass shows the following -

a) North of the magnetic needle of compass - shows the south pole of the magnetic field

b) South of the magnetic needle of compass - shows the North pole of the magnetic field

answer; i believe the correct answer is (anemia);

weathering is the answer.