The food source whose scarcity caused the Yellowstone National Park beaver population to decrease is willow. Beavers primarily rely on willow and other woody plants for food and building materials, so a decrease in willow availability would directly impact their population.
Which food source’s scarcity caused the Yellowstone National Park beaver population to decrease?(1 point)
Responses
willow
willow
otter
otter
fish
fish
grass
grass
1 answer