Based on the provided options, the correct vocabulary word that describes the objects in the picture would depend on whether the objects are naturally occurring or mathematically defined.
- If the objects have irregular, free-flowing shapes often found in nature, "organic shape" or "Organic form" would be appropriate.
- If the objects have precise, regular shapes, such as cubes, spheres, or other polygonal shapes, then "geometric shape" or "geometric form (3D)" would be suitable.
Without seeing the picture, I can't give a definitive answer, but you can choose based on the characteristics of the objects depicted.