To determine which natural resource was used for the drawing, more context is needed about the medium or technique of the drawing. However, I can provide some insights on each option:
- Clay - Typically used for sculpting or pottery, not drawing.
- Wax-based colored pencils - Made from wax and pigments, these are tools for drawing.
- Graphite pencils - Made primarily of graphite (a form of carbon), these are widely used for drawing and sketching.
- Watercolors - Made from pigments suspended in a water-based solution, used for painting rather than drawing.
Based on these explanations, if the drawing is created with pencils, the answer would be either "wax-based colored pencils" or "graphite pencils." If it involves paint, then the answer would be "watercolors." If you provide more context, I could assist you better!