Which of the following statements is incorrect?

Gravity activates all downslope movements of matter and also causes stresses on the earth’s materials.

Direct gravitational stresses activate wave and tide induced currents and winds.

The erosion, transportation and deposition of the earth's surface is possible due to gravity and gradation.

Gravity is the force that switches on the movement of all surface material on earth.

Any exogenic element capable of acquiring and transporting earth materials can be called a geomorphic agent.