The bird, Parus major, is commonly found in man-made habitats. During the 1 point
summer these birds primarily feed on insects, and in the winter, when
insects are scarce, they forage in gardens and bird feeders for seeds, nuts,
and berries. Recently, climate change has led to a decrease in food
available from gardens, and scientists have observed that the average
beak length of the birds has increased. Which of the following best explains
the directional shift in beak length in these birds?
O
Longer beaks allow the birds to better fend off predators.
O
Longer beaks allow the birds to better access seeds in bird feeders.
O
Longer beaks increase the fitness of the birds in wild habitats.
O
Longer beaks decrease the fitness of the birds in wild habitats.