Aresearcher believes that eating all organic foods will improve blood pressure. so, the researcher studies groups as their diet is altered. describe the independent variable (treatment variable) and the dependent variable (the variable of interest).

Blood pressure- dependent variable

Type of food consumed- independent variable

Step-by-step explanation:

Blood pressure is dependent on the diet of groups hence blood pressure is a dependent variable while the type of organic food is the independent variable since it's not affected by anything. Independent variables are what someone believes that they may have an effect on something.

cluster sampling.

step-by-step explanation: