Answer:
Because through them plants are able to supply their nitrogen needs and provide this element to humans and other animals whose nitrogen is essential.
Explanation:
Biological nitrogen fixation (BNF) is considered, after photosynthesis, the most important biological process on the planet. It is based on the fact that some microorganisms, known as diazotrophic, are able to break the bond that joins the two atoms of atmospheric nitrogen (N2) into ammonia (NH3), which is assimilable by plants. If the association between these microorganisms and plants is efficient, the fixed N can supply the needs of the plant, eliminating the use of nitrogen fertilizers and thus offering economic and ecological advantages. In addition, through food, plants provide nitrogen to humans and other animals.
The process of nitrogen fixation is important to life because it is the only route between abiotic and biotic nitrogen movement.
It is the process whereby atmospheric nitrogen is converted into usable forms by living organisms.
Atmospheric nitrogen is inert and therefore unusable living organisms.
During nitrogen fixation, the unusable nitrogen is converted to usable forms either by symbiotic or non-symbiotic processes.
Thus, nitrogen gets into the biosphere via fixation. Without it, living organisms will not be able to get the much-needed nitrogen for their proper functioning.
More on nitrogen fixation can be found here: https://brainly.com/question/4191267
