Describe the possible route from the ocean to a tree of a nitrogen atom contained in an ammonia molecule

As a result of leaching or eutrophication, the ocean gets accumulated with certain nitrogenous compounds such as ammonia. The decomposition of various dead organisms of the ocean will result in converting certain ammonium molecules into nitrogen air of the air.The nitrogen will be passed from the air to the soil as a result of precipitation.The nitrogen -fixing bacteria will fix the atmospheric nitrogen and convert it into a form that will be used by plants.The plants will take this nitrogen compounds from the soil.

The answer is b, as with an inference you make a statement with no evidence