Do not worry so much about the why of classification. Classification is important because it is a lens through which to see what is there. It is not intrinsically true in and of itself. Distinctions are important only as vehicles for a common base of communication. All things have symmetry. A reflection has symmetry. Symmetry means organized life. Organized life is what happens when RNA replicates. It is the difference between chaos and order
They are formed with the flow of air or water.
The answer should be
Shear stress
White Blood Cells could be a possible answer. Not sure if this is multiple choice or not.
A researcher is studying the science of attractiveness and asks volunteer test subjects to rank what trait they find most attractive in a person. What type of variable is the dependent variable in this experiment?
-Categoric
Sunny~ ☺