It would be D because it it based off of knowledge and you are proposing a hypothesis before conducting an experiment to predict what will happen
Answer:
branched chains, linear chains, and bezene rings
No I have not completed it but, I'd be happy to help you with any other questions you might have.
The plants use the sun as their energy, using photosynthesis.
The insect and animals get their energy from the food they eat.
And bacteria get their energy by decomposing dead organisms.
You might have to do the research on what each animal eats if you need specific answers.
I'm sorry this isn't much, but hope this helps you out! :)