If you walked northward from the equator and noticed a trend of skin color changing by becoming lighter, this is known as <u>Cline</u>.
<h3>What is cline?</h3>
This is the tendency of a gradient to form in a certain biological trait in organisms that are separated by distance.
The humans separated by distance from the equator upwards, show cline because there is a complexion gradient in their skin tone with those northward from the equator being lighter.
