To which trophic level do elk belong?
a. producer
b. decomposer
c. primary consumer
d. secondary consumer

C: primary Consumer

primary consumers are typically animals that eat plants aka herbivores.

producers would be plants

secondary consumers are typically ones that eat meat or eat meat and plants aka omnivores.

 decomposers, I believe are like your fungus or anything that feeds off of dead organisms or eat the waste of that organism.

Hopefully this helped. I  remember learning about this in college.  

the correct answer is c   with the systems