Answer:
when the producers(plants) absorbs nitrogen compounds from soil and use then to make proteins.
Answer:
Distraction is caused by: the lack of ability to pay attention; lack of interest in the object of attention; or the great intensity, novelty or attractiveness of something other than the object of attention. Distractions come from both external sources, and internal sources.
There is a community of organisms but no no living components
Sensory receptors is the answer I found