Nutrients means the substance provide the organic raw material to other organism, here what does organic raw material means?

Organic substances,: unlike minerals, are carbon-based compounds derived from plants or animals. In pop culture, "organic" refers to food or livestock grown or raised without man-made pesticides, herbicides or other chemicals like antibiotics. Raw materials are the basic substances that make up more complex substances. For example, flour, yeast & water are the raw materials used for making bread. Hope this helps!