Many natural ecosystems have been destroyed by human activity. To better manage our remaining natural ecosystems, we must first understand how the ecosystems are structured. One way to do this is to determine how the organisms in the ecosystem obtain the matter and energy they need to survive. The figure below shows a simplified food web. Use the figure to answer the following questions. Which of the following correctly shows one pathway for the flow of energy to an owl?

A.
owls → squirrels → foxes
B.
green plants → mice → squirrels
C.
owls → green plants → mice
D.
green plants → squirrels → owls