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. grizzly bear
B. snowy owl
C. bilberry
D. brown lemming
Pick the correct answer from the listed options and provide the letter of the selected option.

A