Question

WILL MARK BRAINLIEST!

Answer 1

Answer:

D. Tap water is one of the three test conditions of the independent variable, the type of water.

Explanation:

An independent variable is the part of a science experiment that is changed. Since you are changing the type of water, the independent variable would be the water. There are 3 types of water in this experiment, meaning the tap water is one of the 3 test conditions of the independent variable.