Because the pigments in objects absorb or reflect light, and the reflected light which we recognize as a specific color. Each person or animal could recognize that color as something completely different than another. Also, because color is only a reflection of light, what we recognize may not be an inherent property at all.
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When an ophthalmologist uses an ophthalmoscope to look into your eye he sees the following view of the retina
In the center of the retina is the optic nerve, a circular to oval white area measuring about 2 x 1.5 mm across. From the center of the optic nerve radiates the major blood vessels of the retina. Approximately 17 degrees (4.5-5 mm), or two and half disc diameters to the left of the disc, can be seen the slightly oval-shaped, blood vessel-free reddish spot, the fovea, which is at the center of the area known as the macula by ophthalmologists.
Answer:
for food
Explanation:
animals often compete over common resources such as food and shelter
