cats that eat mice cows that graze on grass pigs that form large herds chickens that lay large eggs
I gave my students this multiple choice question: Which is an example of an organism that has been selectively bred for a particular genetic trait?

Only one answer is correct among these 4 choices:
- cats that eat mice
- cows that graze on grass
- pigs that form large herds
- chickens that lay large eggs

Could you tell me which one is correct?

chickens that lay large eggs