producer decomposer first-level consumer second-level consumer
I gave my students this multiple choice question: Aphids are small, soft-bodied insects that feed on certain types of plants. Which level of a food web would be occupied by an aphid?

Only one answer is correct among these 4 choices:
- producer
- decomposer
- first-level consumer
- second-level consumer

Could you tell me which one is correct?

first-level consumer