It is b. If I am wrong I am sorry
This relates to Evolution
Ocean currents can be generated by wind so I believe the answer is B
True north is a fixed point on the globe. Magnetic north is quite different. Magnetic north is the direction that a compass needle points to as it aligns with the Earth's magnetic field. ... However, its position is constantly changing, and soon magnetic north and true north will align.
The order of levels of organization from smallest to largest is Specialized Cells, Cardiac Muscle, Heart.