A research team wanted to produce a smaller variety of German shepherd dogs. They mated the smallest dogs from different litters for several generations. This is an example which concept?

Here's why:

* Artificial selection is the process where humans intentionally breed organisms with desirable traits. In this case, the research team is intentionally selecting the smallest German Shepherds to breed, hoping to produce offspring with that desired trait (smaller size).

* Natural selection is the process where organisms with traits better suited to their environment are more likely to survive and reproduce, passing those traits on. This is not happening in this scenario.

Let me know if you'd like more information about either concept!