Question

_________ depend on experimental conditions.
observational variables
dependent variables
independent variables
controlled variabl

Explanation:

In experimental design, dependent variables are the variables whose values depend on the experimental conditions (specifically, they depend on the independent variables that are manipulated in the experiment). Observational variables are more about what is observed in a study (not specifically dependent on experimental conditions in the same way), independent variables are the ones manipulated (they cause change, not depend), and controlled variables are kept constant. So the correct term here is "Dependent variables".

Answer:

Dependent variables