Answer:
The curved path of global winds and surface currents are caused by Earth's rotation and Coriolis force.
Step-by-step explanation:
Earth's rotation affects water and air movement. That rotation has west to east direction, and one spot makes full circle in one day, or 24 hours. Global winds curve due to rotation and very best example are permanent winds. Trade winds, which are common for Tropics and equatorial regions, blows in north-south (Northern hemosphere) and south-north (Southern hemishere) directions. But, due to rotation, air curves in the right (North) and in the left (South). Similar is with ocean currents.
Coriolis force is the effect of curving movement of object in the perpendicular (straight line) system. In clockwise system this effect 'pushes' object to the left, and in counterclockwise it is vice versa.
Both rotation and Corilois force are the reason for curvatures of winds and currents around the globe.