I need help with this question, all of the info is shown in the attached picture!!

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.

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?