Question

_____ refers to a type of research study in which one variable is manipulated by the researcher, while all the other factors are held constant.

Answer 1

Controlled experiment.

Step-by-step explanation:

• In a field of study when the researcher studies the two variables as the dependent and independent variable the researcher tries to find and estimate the values of the depends among them by manipulating variable in an experiment and another factor is held in a constant pace the researcher thus make a controlled study of the phenomenon at hand and such as can be study of the seeds of flowers plant that are kept in a controlled environmental setting.