The term used for a group of words that does not contain a verb or a subject and that acts as a single part of speech is D. a phrase.
B) A disease can destroy everything
In the experiment, the independent variable is the drug amount. Experiment group is given certain amount of drug, control group is not given the drug. The dependent variable is the body fat. I think you means the control is the living environment including food and water.
It affects the environment by maybe causing pollution
