The correct answer is A. Urea.
Urea is a nitrogen-rich fertilizer that is commonly used in agriculture. It is a white, crystalline solid that is soluble in water. Urea is produced by the reaction of ammonia and carbon dioxide.
Ammonium nitrate is a nitrogen-rich fertilizer that is also commonly used in agriculture. It is a white, crystalline solid that is soluble in water. Ammonium nitrate is produced by the reaction of ammonia and nitric acid.
Potassium nitrate is a potassium-rich fertilizer that is also commonly used in agriculture. It is a white, crystalline solid that is soluble in water. Potassium nitrate is produced by the
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