The correct answer is A. Urea.
Urea is a common nitrogenous fertilizer that is used to increase the growth of plants. It is a white, odorless solid that is soluble in water. Urea is produced by the reaction of ammonia and carbon dioxide. It is a relatively inexpensive fertilizer and is easy to apply.
Ammonium sulfate is a common nitrogenous fertilizer that is used to increase the growth of plants. It is a white, crystalline solid that is soluble in water. Ammonium sulfate is produced by the reaction of ammonia and sulfuric acid. It is a relatively inexpensive fertilizer and is easy to apply.
Ammonium nitrate is a common nitrogenous fertilizer that is used to increase the growth of plants. It is a white, crystalline solid that is soluble in water. Ammonium nitrate is produced by the reaction of ammonia and nitric acid. It is a relatively inexpensive fertilizer and is easy to apply.
Calcium citrate is a common calcium supplement that is used to prevent or treat calcium deficiency. It is a white, crystalline powder that is soluble in water. Calcium citrate is produced by the reaction of calcium carbonate and citric acid. It is a relatively inexpensive supplement and is easy to take.
However, calcium citrate is not a
fertilizer. It does not contain nitrogen, which is essential for plant growth. Therefore, it is not the correct answer to the question.