Questions: What defines form? Light and shadow Contrast and tone Lines and texture Texture and shape

The answer is the fourth one: Texture and shape.

Explanation for each option:

1. Light and shadow: While light and shadow can influence the perception of form by creating depth and dimension, they do not define form itself. They are more about how form is perceived visually.

2. Contrast and tone: These elements relate to the visual differences in color and brightness, which can affect the perception of form but do not define it.

3. Lines and texture: Lines can outline or suggest form, and texture can add detail, but together they do not define form.

4. Texture and shape: Shape is a fundamental aspect of form, as it defines the outline or contour of an object. Texture adds detail to the surface of the shape, contributing to the overall perception of form. Therefore, texture and shape together define form.

In summary, form is primarily defined by texture and shape, as these elements provide the essential structure and surface characteristics of an object.