Farmers need to make many decisions about how they grow their crops. One of these decisions is whether to use synthetic fertilizer or organic fertilizer, such as manure.

An advantage of using synthetic fertilizer instead of organic fertilizer is that
synthetic fertilizer can provide more targeted macronutrients to the crops

TRUE

Explanation:

Synthetic or man-made fertilizers are formed from petroleum industry byproducts such as Ammonium Nitrate, Ammonium Phosphate, Potassium Sulfate, etc. Plants on their own require three core macronutrients such as Nitrogen, phosphorus and Potassium, which are used up in large quantities and must be replaced frequently.

The much-needed replacement are done quickly through the use of synthetic fertilizers and plants grow well under these fertilizer conditions.

the answer is b, encourage free trade

can you explain it better