Context: Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
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 silver maple?
A. bolete fungus
B. swallowtail caterpillar
C. pine vole
Identify the correct option from the choices provided and respond with the letter of the correct option.

A