Context: Read the passage. Then answer the question below.

The forests in Oregon's Cascade mountains include western red cedar and Douglas fir, two of the tallest tree species in the world. Both of these species can grow to be 100 meters tall, or as tall as a 30-story building!
Several owl species, including long-eared owls, great horned owls, and northern pygmy owls, live in these forests. Owls are nocturnal, which means they are most active at night. During the day, they rest high in the tall trees.
Figure: fir trees in the Cascade mountains.
Which of the following best describes a population in a forest in the Cascade mountains?
A. the western red cedar trees
B. the great horned owls and the northern pygmy owls
C. the Douglas fir trees and the long-eared owls
Pick the correct answer from the listed options and provide the letter of the selected option.
Answer: A