Which best defines nitrogen fixation?

A.) the process of creating free nitrogen for plants to absorb
B.) the breakdown of nitrogen in the soil
C.) the conversion of nitrogen gas into a usable form
D.) the destruction of the bonds between nitrogen and other elements

i think it is true since you can test the answer and can use observations to complete it.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?