researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a…

researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a grass diet. this method of gathering data is classified as a census. a sample survey. an experiment. an observational study.

researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a grass diet. this method of gathering data is classified as a census. a sample survey. an experiment. an observational study.

Answer

Answer:

D. an observational study.

Brief Explanations:

Researchers are just observing cattle on different diets without interfering or manipulating variables, which is characteristic of an observational study.