Concept:Green plants manufacture their own food through photosynthesis, and the raw materials they use are inorganic substances.Explanation:Photosynthesis is the process by which green plants produce food in the form of glucose.The two essential raw materials are carbon dioxide and water.Carbon dioxide is absorbed from the atmosphere through the stomata of leaves.Water is absorbed from the soil by root hairs and transported upward to the leaves.Inside the leaf, carbon dioxide and water react in the presence of sunlight and chlorophyll.The overall equation for photosynthesis is:6CO2+6H2Osunlight, chlorophyllC6H12O6+6O2Both carbon dioxide and water are inorganic compounds.They cannot be described as mainly fluids, living materials, or mainly gases, because the correct category for these raw materials is inorganic substances.Answer:B. inorganic substances