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.
Based on the arrows, which of the following organisms is an omnivore?
A. barren-ground caribou
B. grizzly bear
Pick the correct answer from the listed options and provide the letter of the selected option.

B