Can anyone answer the one with the explain

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

In what for do plants utilize nitrogen? why do they need nitrogen?