The correct answer is a) Rock phosphate.
Rock phosphate is a mineral that is used in the fertilizer industry. It is a major source of phosphorus, which is an essential nutrient for plants. Phosphorus is used in the production of DNA and RNA, and it is also involved in energy production and cell signaling.
Gypsum is a mineral that is used in a variety of industries, including the construction, agriculture, and mining industries. It is a major source of calcium and sulfur, which are essential nutrients for plants. Calcium is used in the production of plant cell walls, and it is also involved in cell signaling. Sulfur is used in the production of proteins and amino acids, and it is also involved in energy production.
Nitrates are salts that are used in the fertilizer industry. They are a major source of nitrogen, which is an essential nutrient for plants. Nitrogen is used in the production of proteins and amino acids, and it is also involved in energy production.
Potash is a mineral that is used in the fertilizer industry. It is a major source of potassium, which is an essential nutrient for plants. Potassium is used in the production of plant cell walls, and it is also involved in water regulation and energy production.
In conclusion, rock phosphate is the mineral that is crucial in the fertilizer industry. It is a major source of phosphorus, which is an essential nutrient for plants.