How do vocabularies and nomenclatures differ from classification systems?

Aresearcher 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

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

What type of competition exsist between two species. turtles and fish