Do algae consume other organisms? Which organisms consume algae? Do algae use sunlight to make food? Could an ecosystem survive without algae?
I gave my students this multiple choice question: A student hypothesizes that algae are producers. Which question will best help the student determine if this is correct?

Only one answer is correct among these 4 choices:
- Do algae consume other organisms?
- Which organisms consume algae?
- Do algae use sunlight to make food?
- Could an ecosystem survive without algae?

Could you tell me which one is correct?

Do algae use sunlight to make food?