Blue eyes<span> are blue to lack of melanin, brown </span>eyes<span> are brown due to a lot of melanin and </span>hazel<span> or green </span>eyes<span> have melanin levels in between, and, as such, can appear to take on different hues based on how they blend with the </span>colors<span> people wear, the </span>color<span> of their hair</span>
Nearly all of the energy that drives an ecosystem comes from the sun in the form of solar energy. Solar energy enters the ecosystem through a process of photosynthesis that is the starting point for all forms of plant and animal life on the planet. The sun and solar energy are the beginning source of energy for almost all functioning ecosystems and organisms on the planet.
