Answer:Fixation - Fixation is the first step in the process of making nitrogen usable by plants. Here bacteria change nitrogen into ammonium. Nitrification - This is the process by which ammonium gets changed into nitrates by bacteria. Nitrates are what the plants can then absorb
Explanation:
They are can be except for wind weathering i believe. That is caused by the wind.
Ocean trenches are created by the moving apart of tectonic plates, volcanoes are pushed to erupt by the movement of tectonic plates and earthquakes are cause by the movement also.
