Which of the following is an example of a descriptive image?

there is no image so can't really tell which is a descriptive image

a

explanation:

hopefully this will you you're welcome

a constant variable, normally called a controlled variable, is the term for a variable that remains constant throughout an experiment, though other variables may change. an example is the water pressure for a faucet when measuring the amount of water released when the faucet is opened to various increments.