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.
Answer:
relating to or determined by the origin, development, or causal antecedents of something
Explanation:
A is the answer
Training programs for animal control officers usually take from a few weeks to a few months to complete.