Which condition is most responsible for causing wind?

a. rotation of the earth

b. polar cooling

c. uneven heating of the earth by the sun

d. coriolis effect

The correct option is C. Uneven heating of the earth by the sun  is the condition most responsible for causing wind.

Explanation:

Wind arises due to contrasting pressures at different parts of the earth. These separate atmospheric pressures are caused due to the uneven heat showered by the sun on the earth. Hence, this phenomenon will generate the movements of winds from an area of high pressure to an area of low pressure.

Other options such as Coriolis effect are incorrect because the Coriolis effect explains the deflections caused in the wind, it is not the actual reason why winds are caused.