2. When people tan and get dark skin during summer and lose it and go back to their light skin during the winter, the change in skin coloration is a seasonal acclimatization. The change is an acclimatory adjustment to the destructive effects of ultraviolet radiation from the sun.
3. This is very useful information. It helps us better understand how we adapt to our world and most of all, each other. This information can help others relate to each other and become less racist and stereotypical. Instead of one discriminating another for their different skin color, they can understand that it is only a biological production of melanin to protect them from ultraviolet rays. They can understand that it is an acclimatization and that adaption can occur with any human.
4. Most people conclude a person's race through their external look or culture. Little did they know it is mostly about their biological make up and seasonal acclimatization. I learned that skin color is from melanin and that there are two forms: pheomelanin which is red to yellow in color, and eumelanin which is dark brown to black. People with light complexioned skin mostly produce pheomelanin, while those with dark colored skin mostly produce eumelanin. Sun exposure can depend on location. Hence why Africans can be darker skin-toned than Europeans. Also people can differ in the number and size of melanin particles. Lighter skin color can also be affected by red cells in blood flowing close to the skin. Hair color is also due to the presence of melanin. It is better to be informed of the actual science of how and why we humans look different from each other. We find that we are actually all more genetically alike than we think. No matter what skin color you have, you can see it change through seasons and depending on where you go or live.
