Which of the following is an example of a cycle theme in science? seasons electrons and protons the solar system relationship between plants and animals

Out of these answers, the one that best fits this description is the fourth option, or the relationship between plants and animals. An example of this is when a plant releases oxygen, an animals breathes in this oxygen and releases carbon dioxide that the plant uses. This is an ongoing cycle that continues to promote life on our planet. I hope this helps friend :) 

Regular or uniform type