Final answer:
The location of the eyes in an organism determines how much of the surroundings it can see. The eyes detect light and form images that are projected onto the retina. The fovea, with the greatest density of light receptors, provides the greatest acuity.
Step-by-step explanation:
The location of the eyes in an organism, particularly in terms of its interaction with the environment, best illustrates the relationship between its structure and function by determining how much of the surroundings an organism can see. The eyes allow organisms to detect light and form images that are projected onto the light-sensitive retina. The lenses of the eyes adjust their power to produce clear images on the retina for objects at different distances. The center of the image falls on the fovea, which has the greatest density of light receptors, providing the greatest acuity in the visual field.