Context: Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem.
Which of these organisms contains matter that was once part of the lichen?
A. rough-legged hawk
B. parasitic jaeger
C. Arctic fox
D. snowy owl
E. barren-ground caribou
Select the correct answer from the provided options and reply with the letter associated with it.
Answer: E