a buffalo drinking water a bear catching a fish a rabbit running across the sand a pig rolling in the mud
I gave my students this multiple choice question: Which of these is the best example of organisms interacting with each other in an ecosystem?

Only one answer is correct among these 4 choices:
- a buffalo drinking water
- a bear catching a fish
- a rabbit running across the sand
- a pig rolling in the mud

Could you tell me which one is correct?

a bear catching a fish