Step-by-step explanation:
Based on the given options, the best answer for an example of form related to photography is option B) a 3-D shape.
In photography, form refers to the three-dimensional quality of an object or subject that can be conveyed through the use of light and shadow, texture, and other visual cues. For instance, a photograph of a sculpture or a person's face can effectively show the form by highlighting the contours, depth, and dimensionality of the subject. Option D) about the way photographers choose the colors for their images is not directly related to form but rather concerns the use of color in photography.