Answer:
B or C depending on if there is a fish on the food chain
(most likely C though)
Explanation:
consumers are things that eat other things
producers are things that make energy for themselves and they can survive off that energy (anything that does photosynthesis)
Algae does photosynthesis. so A and D is wrong
B and C could be the right answers depending on if a fish is shown.
any item above another item with a like drawn to it in a food web is a consumer
producers are at the very bottom of the food web.