a boy playing with a ball a bird building a nest a horse pulling a wagon a dog sitting on command
I gave my students this multiple choice question: Which situation is the best example of an inherited trait?

Only one answer is correct among these 4 choices:
- a boy playing with a ball
- a bird building a nest
- a horse pulling a wagon
- a dog sitting on command

Could you tell me which one is correct?

a bird building a nest