Question 1 (1 point) More dogs are being diagnosed with thyroid problems than have been diagnosed in the past. A researcher identified 50 puppies without thyroid problems and kept records of their diets for several years to see if any developed thyroid problems. This is a(n) An Experiment An Observational Study A Simple Random Sample None of the above.

The researcher's approach falls under an observational study because they are monitoring the dietary habits of the puppies over time to see if any develop thyroid issues without intervening or manipulating their diet. An experimental study would involve changing the diet of some puppies to directly test the effect on thyroid health. In the world of veterinary research, observational studies like this one can provide valuable insights into long-term health trends. By observing a group without making changes, researchers can uncover correlations that might lead to better understanding and prevention of ailments like thyroid issues in dogs, ultimately benefiting pet health and welfare.