Question

in an experiment, the factor that a scientist deliberately manipulates is the
independent variable
hypothesis
control
dependent variable

Explanation:

In scientific experiments, the independent variable is the factor that the scientist deliberately changes or manipulates to observe its effect on the dependent variable. A hypothesis is a proposed explanation, a control is used for comparison to isolate the effect of the independent variable, and the dependent variable is what is measured and affected by the independent variable.

Answer:

Independent variable