Question

Why do sociologist say that race is socially constructed

Answer 1

Because they have defining features such as skin color and physical capabilities.
Social Stratification is when we sort other skin colored people into a hierarchy just to justify inequality. I personally think that is rude and unfair.

Answer 2

The concept of race is ubiquitous yet tricky :people think race is obvious because, if you are visually abled you can tell that people are different based on their skin colour and other physical signs