A group of organisms that interact with and depend upon one another is called a community. The movement of matter and energy through a community can be studied by examining its food web. As organisms eat other organisms, energy and nutrients pass through various feeding levels. These feeding levels are called trophic levels. The following is a diagram of the energy and nutrient flow through a simple community.
Which of the following would be a reasonable organism to find in the PRODUCERS level (circle)?
a
tigers
b
mushrooms
c
grasses
d
bunnies