Which best defines nitrogen fixation? the process of creating free nitrogen for plants to absorb the breakdown of nitrogen in the soil the conversion of nitrogen gas into a usable form the destruction of the bonds between nitrogen and other elements

The nitrogen fixation is the process of conversion of nitrogen gas into a usable form.

Answer: Option 3

Explanation:

The nitrogen fixation is the process where the nitrogen gas present in air gets trapped and converted into ammonia or other nitrogenous compounds. This is the first step of nitrogen cycle.

The atmospheric nitrogen will get absorb in soil and gets converted to either ammonia which acts as nutrition for plants or other nitrogen related compounds which acts as fertilizers.

So, the nitrogen which get converted to usable stable form of nitrogen compounds can be used by plants, microorganisms and other organisms in the ecosystem.