Concept:
The Coriolis force arises due to the rotation of the Earth and affects the motion of objects like winds and ocean currents.
Step 1: Understanding Coriolis force variation.
The magnitude of the Coriolis force depends on latitude:
\[
F \propto \sin \phi
\]
where \( \phi \) is the latitude.
Step 2: Evaluating at Equator.
At the Equator:
\[
\phi = 0^\circ \Rightarrow \sin 0^\circ = 0
\]
Hence, Coriolis force is zero.
Conclusion:
Thus, the correct answer is Equator.