Question

a variable that causes change to occur, this variable is manipulated during an experiment
quantitative variable
independent variable
dependent variable
intervening variable

Explanation:

This question asks to identify the variable that is manipulated in an experiment to cause a change. A quantitative variable is defined by numerical values, a dependent variable is the one measured for changes, and an intervening variable explains the relationship between other variables. Only the independent variable is intentionally changed/manipulated in experiments.

Answer:

Independent Variable