Red squirrels usually eat hazelnuts, but due to a reduction in their food source, they had to share resources with

squirrels. The number of red squirrels decreased over time, and gray squirrels gradually replaced the red squirre
they are better adapted to the environment. This is an example of (1 point)
O natural selection.
O survival of the fittest.
O competitive exclusion.
O resource partitioning.