Why does coriolis dflection increase at the poles?

Coriolis deflection increases at the poles due to the convergence of longitude lines that occurs as one approaches the poles. Since the Earth rotates on its axis, objects moving in a straight line appear to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Near the poles, this effect is more pronounced because the rotational velocity of the Earth is lower, causing even small movements to result in larger apparent deflections. Thus, the Coriolis effect is strongest at the poles and diminishes toward the equator.