Explain how nitrogen cycles through the land and ocean ecosystems.

According to socratic.org:

Bacteria in the ocean take the nitrogen, make it into ammonium, then into nitrate. Now, it is used by primary producers, eaten by consumers, and excreted out. The decomposers can now decompose the waste. The bacteria perform denitrification and release nitrogen into the atmosphere.

GIVE BRAINLIEST PLZ :)

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.