moving through the water producing oxygen attracting prey escaping predators
I gave my students this multiple choice question: Some marine organisms living deep in the ocean can produce their own light. The light they produce is most likely used for which of these activities?

Only one answer is correct among these 4 choices:
- moving through the water
- producing oxygen
- attracting prey
- escaping predators

Could you tell me which one is correct?

attracting prey