You are presented with the question "What may eat other organisms at more than one trophic level?" and the following answer choices: 
- barnacles
 - chickens
 - fur seals
 - humans
 - heterotrophs
 - mammals
 - animals
 - rabbit

Now knowing that many consumers feed at more than one trophic level and consumers are heterotrophs that feed on tissues of other organisms, choose the best answer.


 

     heterotrophs    